Split biomes into separate files.

mods/MAPGEN/mcl_biomes/README.md

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-Biomes mod. By Wuzzy and maikerumine.

mods/MAPGEN/vl_biomes/README.md

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+Biomes mod. By Wuzzy, maikerumine, and kno10.

mods/MAPGEN/vl_biomes/badlands-strata.lua

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+local mg_name = minetest.get_mapgen_setting("mg_name")
+local mg_seed = minetest.get_mapgen_setting("seed")
+
+-- SHARED patterns across different variants of badlands/mesa for consistency
+-- Bonus gold spawn in Mesa
+if mg_name ~= "v6" then
+	local stonelike = {"mcl_core:stone", "mcl_core:diorite", "mcl_core:andesite", "mcl_core:granite"}
+	minetest.register_ore({
+		ore_type = "scatter",
+		ore = "mcl_core:stone_with_gold",
+		wherein = stonelike,
+		clust_scarcity = 3333,
+		clust_num_ores = 5,
+		clust_size = 3,
+		y_min = mcl_worlds.layer_to_y(32),
+		y_max = mcl_worlds.layer_to_y(79),
+		biomes = {"Mesa", "Mesa_sandlevel", "Mesa_ocean",
+				  "MesaBryce", "MesaBryce_sandlevel", "MesaBryce_ocean",
+				  "MesaPlateauF", "MesaPlateauF_sandlevel", "MesaPlateauF_ocean",
+				  "MesaPlateauFM", "MesaPlateauFM_sandlevel", "MesaPlateauFM_ocean", },
+	})
+end
+
+-- For a transition from stone to hardened clay in mesa biomes that is not perfectly flat
+minetest.register_ore({
+	ore_type = "stratum",
+	ore = "mcl_core:stone",
+	wherein = {"group:hardened_clay"},
+	noise_params = {offset = -6, scale = 2, spread = vector.new(25, 25, 25), octaves = 1, persist = 0.60},
+	stratum_thickness = 8,
+	biomes = {
+		"Mesa_sandlevel", "Mesa_ocean",
+		"MesaBryce_sandlevel", "MesaBryce_ocean",
+		"MesaPlateauF_sandlevel", "MesaPlateauF_ocean",
+		"MesaPlateauFM_sandlevel", "MesaPlateauFM_ocean",
+	},
+	y_min = -4,
+	y_max = 0,
+
+})
+
+-- Mesa strata (registered as sheet ores)
+
+-- Helper function to create strata.
+local function stratum(y_min, height, color, seed, is_perfect)
+	height = height or 1
+	seed = seed or 39
+	local y_max = y_min + height - 1
+	-- "perfect" means no erosion
+	local perfect_biomes = is_perfect and {"MesaBryce", "Mesa", "MesaPlateauF", "MesaPlateauFM"} or {"MesaBryce"}
+	-- Full, perfect stratum
+	minetest.register_ore({
+		ore_type = "stratum",
+		ore = "mcl_colorblocks:hardened_clay_" .. color,
+		-- Only paint uncolored so the biome can choose
+		-- a color in advance.
+		wherein = {"mcl_colorblocks:hardened_clay"},
+		y_min = y_min,
+		y_max = y_max,
+		biomes = perfect_biomes,
+	})
+	if not is_perfect then
+		-- Slightly eroded stratum, only minor imperfections
+		minetest.register_ore({
+			ore_type = "stratum",
+			ore = "mcl_colorblocks:hardened_clay_" .. color,
+			wherein = {"mcl_colorblocks:hardened_clay"},
+			y_min = y_min,
+			y_max = y_max,
+			biomes = {"Mesa", "MesaPlateauF"},
+			noise_params = {
+				offset = y_min + (y_max - y_min) / 2,
+				scale = 0,
+				spread = vector.new(50, 50, 50),
+				seed = seed + 4,
+				octaves = 1,
+				persist = 1.0
+			},
+			np_stratum_thickness = {
+				offset = 1.28,
+				scale = 1,
+				spread = vector.new(18, 18, 18),
+				seed = seed + 4,
+				octaves = 3,
+				persist = 0.8,
+			},
+		})
+		-- Very eroded stratum, most of the color is gone
+		minetest.register_ore({
+			ore_type = "stratum",
+			ore = "mcl_colorblocks:hardened_clay_" .. color,
+			wherein = {"mcl_colorblocks:hardened_clay"},
+			y_min = y_min,
+			y_max = y_max,
+			biomes = {"MesaPlateauFM"},
+			noise_params = {
+				offset = y_min + (y_max - y_min) / 2,
+				scale = 0,
+				spread = vector.new(50, 50, 50),
+				seed = seed + 4,
+				octaves = 1,
+				persist = 1.0
+			},
+			np_stratum_thickness = {
+				offset = 0.1,
+				scale = 1,
+				spread = vector.new(28, 28, 28),
+				seed = seed + 4,
+				octaves = 2,
+				persist = 0.6,
+			},
+		})
+	end
+
+end
+
+-- Hardcoded orange strata near sea level.
+-- For MesaBryce, since it has no sand at these heights
+stratum(4, 1, "orange", nil, true)
+stratum(7, 2, "orange", nil, true)
+
+-- 3-level stratum above the sandlevel (all mesa biomes)
+stratum(11, 3, "orange", nil, true)
+
+-- Create random strata for up to Y = 256.
+--[[
+
+------ DANGER ZONE! ------
+
+The following code is sensitive to changes; changing any number may break
+mapgen consistency when the mapgen generates new mapchunks in existing
+worlds because the random generator will yield different results and the strata
+suddenly don't match up anymore. ]]
+
+-- These strata are calculated based on the world seed and are global.
+-- They are thus different per-world.
+local mesapr = PcgRandom(mg_seed)
+
+-- Available Mesa colors:
+local mesa_stratum_colors = {"silver", "brown", "orange", "red", "yellow", "white"}
+
+-- Start level
+local y = 17
+-- Generate stratas
+while y <= 256 do
+	-- Each stratum has a color (duh!)
+	local colorid = mesapr:next(1, #mesa_stratum_colors)
+
+	-- … and a random thickness
+	local heightrandom = mesapr:next(1, 12)
+	local h = heightrandom == 12 and 4 or heightrandom >= 10 and 3 or heightrandom >= 8 and 2 or 1
+	-- Small built-in bias: Only thin strata up to this Y level
+	if y < 45 then h = math.min(h, 2) end
+
+	-- Register stratum
+	stratum(y, h, mesa_stratum_colors[colorid])
+
+	-- Skip a random amount of layers (which won't get painted)
+	local skiprandom = mesapr:next(1, 12)
+	local skip = skiprandom == 12 and 4 or skiprandom >= 10 and 3 or skiprandom >= 5 and 2 or skiprandom >= 2 and 1 or 0
+
+	-- Get height of next stratum or finish
+	y = y + h + skip
+end
+--[[ END OF DANGER ZONE ]]
+
+-- Dead bushes
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	priority = 1500,
+	place_on = {"group:sand", "mcl_core:podzol", "mcl_core:dirt", "mcl_core:dirt_with_grass", "mcl_core:coarse_dirt", "group:hardened_clay"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.01,
+		scale = 0.06,
+		spread = vector.new(100, 100, 100),
+		seed = 1972,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	biomes = {"Mesa", "Mesa_sandlevel", "MesaPlateauF", "MesaPlateauF_sandlevel", "MesaPlateauF_grasstop", "MesaBryce"},
+	decoration = "mcl_core:deadbush",
+	height = 1,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	priority = 1500,
+	place_on = {"group:sand", "mcl_core:dirt", "mcl_core:dirt_with_grass", "mcl_core:coarse_dirt"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.01,
+		scale = 0.06,
+		spread = vector.new(100, 100, 100),
+		seed = 1972,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	biomes = {"MesaPlateauFM_grasstop"},
+	decoration = "mcl_core:deadbush",
+	height = 1,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	priority = 1500,
+	place_on = {"group:sand"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.01,
+		scale = 0.06,
+		spread = vector.new(100, 100, 100),
+		seed = 1972,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	biomes = {"MesaPlateauFM", "MesaPlateauFM_sandlevel"},
+	decoration = "mcl_core:deadbush",
+	height = 1,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	priority = 1500,
+	place_on = {"group:hardened_clay"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.01,
+		scale = 0.06,
+		spread = vector.new(100, 100, 100),
+		seed = 1972,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	biomes = {"MesaPlateauFM", "MesaPlateauFM_sandlevel", "MesaPlateauFM_grasstop"},
+	decoration = "mcl_core:deadbush",
+	height = 1,
+})

mods/MAPGEN/vl_biomes/badlands.lua

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+-- Mesa aka Badlands
+-- Starts with a couple of sand-covered layers (the "sandlevel"),
+-- followed by terracotta with colorful (but imperfect) strata
+vl_biomes.register_biome({
+	name = "Mesa",
+	node_top = "mcl_colorblocks:hardened_clay",
+	depth_top = 1,
+	node_filler = "mcl_colorblocks:hardened_clay",
+	node_riverbed = "mcl_core:redsand",
+	depth_riverbed = 1,
+	node_stone = "mcl_colorblocks:hardened_clay",
+	y_min = 11,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 0,
+	heat_point = 100,
+	_mcl_biome_type = "hot",
+	_mcl_water_temp = "warm",
+	_mcl_grass_palette_index = 19,
+	_mcl_foliage_palette_index = 4,
+	_mcl_water_palette_index = 3,
+	_mcl_skycolor = "#6EB1FF",
+	-- Helper biome for the red sand at the bottom of Mesas.
+	_sandlevel = {
+		node_top = "mcl_core:redsand",
+		depth_top = 1,
+		node_filler = "mcl_colorblocks:hardened_clay_orange",
+		depth_filler = 3,
+		node_stone = "mcl_colorblocks:hardened_clay_orange",
+		y_min = -4,
+		y_max = 10,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 3,
+		node_filler = "mcl_core:sand",
+		depth_filler = 2,
+		node_riverbed = "mcl_core:sand",
+		depth_riverbed = 2,
+		y_max = -5,
+		vertical_blend = 1,
+	},
+})

mods/MAPGEN/vl_biomes/badlands_eroded.lua

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+-- Mesa Bryce aka Eroded Badlands
+-- Variant of Mesa, but with perfect strata and a much smaller red sand desert
+vl_biomes.register_biome({
+	name = "MesaBryce",
+	node_top = "mcl_colorblocks:hardened_clay",
+	depth_top = 1,
+	node_filler = "mcl_colorblocks:hardened_clay",
+	node_riverbed = "mcl_colorblocks:hardened_clay",
+	depth_riverbed = 1,
+	node_stone = "mcl_colorblocks:hardened_clay",
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = -5,
+	heat_point = 100,
+	_mcl_biome_type = "hot",
+	_mcl_water_temp = "warm",
+	_mcl_grass_palette_index = 20,
+	_mcl_foliage_palette_index = 4,
+	_mcl_water_palette_index = 3,
+	_mcl_skycolor = "#6EB1FF",
+	_sandlevel = {
+		node_top = "mcl_core:redsand",
+		depth_top = 1,
+		node_filler = "mcl_colorblocks:hardened_clay_orange",
+		depth_filler = 3,
+		node_riverbed = "mcl_colorblocks:hardened_clay",
+		depth_riverbed = 1,
+		node_stone = "mcl_colorblocks:hardened_clay_orange",
+		y_min = -4,
+		y_max = 3,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 3,
+		node_filler = "mcl_core:sand",
+		depth_filler = 2,
+		node_riverbed = "mcl_core:sand",
+		depth_riverbed = 2,
+		y_max = -5,
+		vertical_blend = 1,
+	},
+})

mods/MAPGEN/vl_biomes/badlands_wooded.lua

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+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Mesa Plateau F aka Wooded Badlands
+-- Identical to Mesa below Y=30. At Y=30 and above there is a "dry" oak forest
+vl_biomes.register_biome({
+	name = "MesaPlateauF",
+	node_top = "mcl_colorblocks:hardened_clay",
+	depth_top = 1,
+	node_filler = "mcl_colorblocks:hardened_clay",
+	node_riverbed = "mcl_core:redsand",
+	depth_riverbed = 1,
+	node_stone = "mcl_colorblocks:hardened_clay",
+	y_min = 11,
+	y_max = 29,
+	humidity_point = 0,
+	heat_point = 60,
+	vertical_blend = 0, -- we want a sharp transition
+	_mcl_biome_type = "hot",
+	_mcl_water_temp = "warm",
+	_mcl_grass_palette_index = 21,
+	_mcl_foliage_palette_index = 4,
+	_mcl_water_palette_index = 3,
+	_mcl_skycolor = "#6EB1FF",
+	-- The oak forest plateau of this biome.
+	-- This is a plateau for grass blocks, dry shrubs, tall grass, coarse dirt and oaks.
+	-- Strata don't generate here.
+	_grasstop = {
+		node_top = "mcl_core:dirt_with_grass",
+		depth_top = 1,
+		node_filler = "mcl_core:dirt",
+		depth_filler = 1,
+		y_min = 30,
+		y_max = vl_biomes.overworld_max,
+	},
+	_sandlevel = {
+		node_top = "mcl_core:redsand",
+		depth_top = 2,
+		node_filler = "mcl_colorblocks:hardened_clay_orange",
+		depth_filler = 3,
+		node_stone = "mcl_colorblocks:hardened_clay_orange",
+		y_min = -5,
+		y_max = 10,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 3,
+		node_filler = "mcl_core:sand",
+		depth_filler = 2,
+		node_riverbed = "mcl_core:sand",
+		depth_riverbed = 2,
+		y_max = -6,
+		vertical_blend = 1,
+	},
+})
+
+-- Random coarse dirt floor in Mesa Plateau F
+minetest.register_ore({
+	ore_type = "sheet",
+	ore = "mcl_core:coarse_dirt",
+	wherein = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
+	column_height_max = 1,
+	column_midpoint_factor = 0.0,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_threshold = 0.0,
+	noise_params = {offset = 0, scale = 15, spread = vector.new(250, 250, 250), seed = 24, octaves = 3, persist = 0.70},
+	biomes = {"MesaPlateauF_grasstop"},
+})
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "mcl_core:coarse_dirt",
+	wherein = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
+	clust_scarcity = 1500,
+	clust_num_ores = 25,
+	clust_size = 7,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_params = {
+		offset = 0,
+		scale = 1,
+		spread = vector.new(250, 250, 250),
+		seed = 12345,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		flags = "defaults",
+	},
+	biomes = {"MesaPlateauF_grasstop"},
+})
+
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.015,
+		scale = 0.002,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.7
+	},
+	biomes = {"MesaPlateauF_grasstop"},
+	y_min = 30,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+

mods/MAPGEN/vl_biomes/badlands_wooded_mod.lua

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+local mod_mcl_core = minetest.get_modpath("mcl_core")
+-- Mesa Plateau FM aka Modified Wooded Badlands Plateau
+-- Dryer and more "chaotic"/"weathered down" variant of MesaPlateauF:
+-- oak forest is less dense, more coarse dirt, more erratic terrain, vertical blend, more red sand layers,
+-- red sand as ores, red sandstone at sandlevel
+vl_biomes.register_biome({
+	name = "MesaPlateauFM",
+	node_top = "mcl_colorblocks:hardened_clay",
+	depth_top = 1,
+	node_filler = "mcl_colorblocks:hardened_clay",
+	node_riverbed = "mcl_core:redsand",
+	depth_riverbed = 2,
+	node_stone = "mcl_colorblocks:hardened_clay",
+	y_min = 12,
+	y_max = 29,
+	humidity_point = -5,
+	heat_point = 60,
+	vertical_blend = 5,
+	_mcl_biome_type = "hot",
+	_mcl_water_temp = "warm",
+	_mcl_grass_palette_index = 22,
+	_mcl_foliage_palette_index = 4,
+	_mcl_water_palette_index = 3,
+	_mcl_skycolor = "#6EB1FF",
+	-- Grass plateau
+	_grasstop = {
+		node_top = "mcl_core:dirt_with_grass",
+		depth_top = 1,
+		node_filler = "mcl_core:coarse_dirt",
+		depth_filler = 2,
+		node_riverbed = "mcl_core:redsand",
+		depth_riverbed = 1,
+		y_min = 30,
+		y_max = vl_biomes.overworld_max,
+	},
+	_sandlevel = {
+		node_top = "mcl_core:redsand",
+		depth_top = 3,
+		node_filler = "mcl_colorblocks:hardened_clay_orange",
+		depth_filler = 3,
+		node_stone = "mcl_colorblocks:hardened_clay",
+		-- red sand has wider reach than in other mesa biomes
+		y_min = -7,
+		y_max = 11,
+		vertical_blend = 4,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 3,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		node_riverbed = "mcl_core:sand",
+		depth_riverbed = 3,
+		y_min = vl_biomes.OCEAN_MIN,
+		y_max = -8,
+		vertical_blend = 2,
+	},
+})
+minetest.register_ore({
+	ore_type = "sheet",
+	ore = "mcl_core:coarse_dirt",
+	wherein = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
+	column_height_max = 1,
+	column_midpoint_factor = 0.0,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_threshold = -2.5,
+	noise_params = {offset = 1, scale = 15, spread = vector.new(250, 250, 250), seed = 24, octaves = 3, persist = 0.80},
+	biomes = {"MesaPlateauFM_grasstop"},
+})
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "mcl_core:coarse_dirt",
+	wherein = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
+	clust_scarcity = 1800,
+	clust_num_ores = 65,
+	clust_size = 15,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_params = {
+		offset = 0,
+		scale = 1,
+		spread = vector.new(250, 250, 250),
+		seed = 12345,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		flags = "defaults",
+	},
+	biomes = {"MesaPlateauFM_grasstop"},
+})
+-- Occasionally dig out portions of MesaPlateauFM
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "air",
+	wherein = {"group:hardened_clay", "group:sand", "mcl_core:coarse_dirt"},
+	clust_scarcity = 4000,
+	clust_size = 5,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_params = {
+		offset = 0,
+		scale = 1,
+		spread = vector.new(250, 250, 250),
+		seed = 12345,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		flags = "defaults",
+	},
+	biomes = {"MesaPlateauFM", "MesaPlateauFM_grasstop"},
+})
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "mcl_core:redsandstone",
+	wherein = {"mcl_colorblocks:hardened_clay_orange"},
+	clust_scarcity = 300,
+	clust_size = 8,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_params = {
+		offset = 0,
+		scale = 1,
+		spread = vector.new(250, 250, 250),
+		seed = 12345,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		flags = "defaults",
+	},
+	biomes = {"MesaPlateauFM_sandlevel"},
+})
+-- More red sand in MesaPlateauFM
+minetest.register_ore({
+	ore_type = "sheet",
+	ore = "mcl_core:redsand",
+	wherein = {"group:hardened_clay"},
+	clust_scarcity = 1,
+	clust_num_ores = 12,
+	clust_size = 10,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_threshold = 0.1,
+	noise_params = {offset = 0, scale = 15, spread = vector.new(130, 130, 130), seed = 95, octaves = 3, persist = 0.70},
+	biomes = {"MesaPlateauFM"},
+})
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "mcl_core:redsand",
+	wherein = {"group:hardened_clay"},
+	clust_scarcity = 1500,
+	clust_size = 4,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_params = {
+		offset = 0,
+		scale = 1,
+		spread = vector.new(250, 250, 250),
+		seed = 12345,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		flags = "defaults",
+	},
+	biomes = {"MesaPlateauFM", "MesaPlateauFM_grasstop", "MesaPlateauFM_sandlevel"},
+})
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.008,
+		scale = 0.002,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.7
+	},
+	biomes = {"MesaPlateauFM_grasstop"},
+	y_min = 30,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+

mods/MAPGEN/vl_biomes/bamboojungle.lua

@@ -0,0 +1,68 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+-- Bamboo Jungle areas are like the Jungle areas, but warmer and more humid.
+vl_biomes.register_biome({
+	name = "BambooJungle",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 90,
+	heat_point = 95,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 24,
+	_mcl_foliage_palette_index = 12,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#77A8FF",
+	_shore = {
+		node_top = "mcl_core:dirt",
+		depth_top = 1,
+		y_min = -2,
+		y_max = 0,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		y_max = -3,
+		vertical_blend = 1,
+	},
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.025,
+	biomes = {"BambooJungle"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Melon
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.01,
+		scale = 0.006,
+		spread = vector.new(250, 250, 250),
+		seed = 333,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_farming:melon",
+	biomes = {"BambooJungle"},
+})
+

mods/MAPGEN/vl_biomes/bamboojungle_edge.lua

@@ -0,0 +1,59 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Bamboo Jungle Edge
+vl_biomes.register_biome({
+	name = "BambooJungleEdge",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 2,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 92,
+	heat_point = 90,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 26,
+	_mcl_foliage_palette_index = 13,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#77A8FF",
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 2,
+	},
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.0045,
+	biomes = {"BambooJungleEdge"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+-- Melon
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.005,
+		scale = 0.006,
+		spread = vector.new(250, 250, 250),
+		seed = 333,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_farming:melon",
+	biomes = {"BambooJungleEdge"},
+})

mods/MAPGEN/vl_biomes/bamboojungle_modified.lua

@@ -0,0 +1,86 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Bamboo Jungle M
+-- Like Bamboo Jungle but with even more dense vegetation
+vl_biomes.register_biome({
+	name = "BambooJungleM",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 95,
+	heat_point = 95,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 25,
+	_mcl_foliage_palette_index = 12,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#77A8FF",
+	_shore = {
+		node_top = "mcl_core:dirt",
+		depth_top = 1,
+		y_min = -2,
+		y_max = 0,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		y_max = -3,
+		vertical_blend = 1,
+	},
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.09,
+	biomes = {"BambooJungleM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree_2.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.05,
+		scale = 0.025,
+		spread = vector.new(250, 250, 250),
+		seed = 2930,
+		octaves = 4,
+		persist = 0.6,
+	},
+	biomes = {"BambooJungleM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_bush_oak_leaves.mts",
+	flags = "place_center_x, place_center_z",
+})
+-- Melon
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.0,
+		scale = 0.006,
+		spread = vector.new(250, 250, 250),
+		seed = 333,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_farming:melon",
+	biomes = {"BambooJungleM"},
+})

mods/MAPGEN/vl_biomes/bamboojungle_modified_edge.lua

@@ -0,0 +1,83 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Jungle Edge M (very rare).
+-- Almost identical to Jungle Edge. Has deeper dirt. Melons spawn here a lot.
+-- This biome occours directly between Jungle M and Jungle Edge but also has a small border to Jungle.
+-- This biome is very small in general.
+vl_biomes.register_biome({
+	name = "BambooJungleEdgeM",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 4,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 95,
+	heat_point = 95,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 27,
+	_mcl_foliage_palette_index = 13,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#77A8FF",
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 4,
+	},
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.0045,
+	biomes = {"BambooJungleEdgeM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.0085,
+		scale = 0.025,
+		spread = vector.new(250, 250, 250),
+		seed = 2930,
+		octaves = 4,
+		persist = 0.6,
+	},
+	biomes = {"BambooJungleEdgeM"},
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_bush_oak_leaves.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+-- Melon
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.005,
+		scale = 0.006,
+		spread = vector.new(250, 250, 250),
+		seed = 333,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_farming:melon",
+	biomes = {"BambooJungleEdgeM"},
+})
+

mods/MAPGEN/vl_biomes/birchforest.lua

@@ -0,0 +1,68 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+-- Birch Forest
+vl_biomes.register_biome({
+	name = "BirchForest",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 78,
+	heat_point = 31,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "ocean",
+	_mcl_grass_palette_index = 15,
+	_mcl_foliage_palette_index = 8,
+	_mcl_water_palette_index = 0,
+	_mcl_skycolor = "#7AA5FF",
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+	},
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.03,
+		scale = 0.0025,
+		spread = vector.new(250, 250, 250),
+		seed = 11,
+		octaves = 3,
+		persist = 0.66
+	},
+	biomes = {"BirchForest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_birch.mts",
+	flags = "place_center_x, place_center_z",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	--[[noise_params = {
+		offset = 0.01,
+		scale = 0.00001,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.33
+	},]]--
+	fill_ratio = 0.00002,
+	biomes = {"BirchForest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_birch_bee_nest.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+	spawn_by = "group:flower",
+	priority = 1550,
+})

mods/MAPGEN/vl_biomes/birchforest_old.lua

@@ -0,0 +1,69 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+-- Birch Forest M aka Old Growth Birch Forest
+vl_biomes.register_biome({
+	name = "BirchForestM",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 77,
+	heat_point = 27,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "ocean",
+	_mcl_grass_palette_index = 16,
+	_mcl_foliage_palette_index = 8,
+	_mcl_water_palette_index = 0,
+	_mcl_skycolor = "#7AA5FF",
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 3,
+	},
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.03,
+		scale = 0.0025,
+		spread = vector.new(250, 250, 250),
+		seed = 11,
+		octaves = 3,
+		persist = 0.66
+	},
+	biomes = {"BirchForestM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_birch_tall.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	--[[noise_params = {
+		offset = 0.01,
+		scale = 0.00001,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.33
+	},]]--
+	fill_ratio = 0.00002,
+	biomes = {"BirchForestM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_birch_bee_nest.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+	spawn_by = "group:flower",
+	priority = 1550,
+})

mods/MAPGEN/vl_biomes/dark_forest.lua

@@ -0,0 +1,107 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+local mod_mcl_mushrooms = minetest.get_modpath("mcl_mushrooms")
+
+-- Roofed Forest aka Dark Forest
+vl_biomes.register_biome({
+	name = "RoofedForest",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 2,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 94,
+	heat_point = 27,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "ocean",
+	_mcl_grass_palette_index = 18,
+	_mcl_foliage_palette_index = 7,
+	_mcl_water_palette_index = 0,
+	_mcl_skycolor = "#79A6FF",
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 2,
+	},
+})
+
+-- Dark Oak
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.05,
+		scale = 0.0015,
+		spread = vector.new(125, 125, 125),
+		seed = 223,
+		octaves = 3,
+		persist = 0.66
+	},
+	biomes = {"RoofedForest"},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_dark_oak.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+local ratio_mushroom = 0.0001
+local ratio_mushroom_huge = ratio_mushroom * (11 / 12)
+local ratio_mushroom_giant = ratio_mushroom * (1 / 12)
+
+-- Huge Brown Mushroom
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = ratio_mushroom_huge,
+	biomes = {"RoofedForest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mushrooms .. "/schematics/mcl_mushrooms_huge_brown.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "0",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = ratio_mushroom_giant,
+	biomes = {"RoofedForest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mushrooms .. "/schematics/mcl_mushrooms_giant_brown.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "0",
+})
+
+-- Huge Red Mushroom
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = ratio_mushroom_huge,
+	biomes = {"RoofedForest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mushrooms .. "/schematics/mcl_mushrooms_huge_red.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "0",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = ratio_mushroom_giant,
+	biomes = {"RoofedForest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mushrooms .. "/schematics/mcl_mushrooms_giant_red.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "0",
+})
+

mods/MAPGEN/vl_biomes/deco/bamboo.lua

@@ -0,0 +1,31 @@
+-- Bamboo
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt", },
+	sidelen = 80,
+	fill_ratio = 0.0043,
+	biomes = {"Jungle", "JungleM", "JungleEdge", "JungleEdgeM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_bamboo:bamboo",
+	height = 9,
+	max_height = 11,
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt", "mcl_core:podzol"},
+	sidelen = 80,
+	fill_ratio = 0.095,
+	biomes = {"BambooJungle", "BambooJungleM", "BambooJungleEdge", "BambooJungleEdgeM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_bamboo:bamboo",
+	height = 9,
+	max_height = 10,
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+

mods/MAPGEN/vl_biomes/deco/cacti.lua

@@ -0,0 +1,27 @@
+-- Cacti
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:sand"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.01,
+		scale = 0.024,
+		spread = vector.new(100, 100, 100),
+		seed = 257,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_core:cactus",
+	biomes = {"Desert",
+		"Mesa", "Mesa_sandlevel",
+		"MesaPlateauF", "MesaPlateauF_sandlevel",
+		"MesaPlateauFM", "MesaPlateauFM_sandlevel"},
+	height = 1,
+	height_max = 3,
+	spawn_by = "air",
+	check_offset = 1,
+	num_spawn_by = 16
+})
+

mods/MAPGEN/vl_biomes/deco/corals.lua

@@ -0,0 +1,165 @@
+-- TODO: use priorities, and move this to the module where coral blocks are defined?
+local mod_mcl_structures = minetest.get_modpath("mcl_structures")
+local coral_min = vl_biomes.OCEAN_MIN
+local coral_max = -10
+local warm_oceans = vl_biomes.by_water_temp.warm
+
+-- Coral Reefs
+for _, c in ipairs({ "brain", "horn", "bubble", "tube", "fire" }) do
+	local noise = {
+		offset = -0.0085,
+		scale = 0.002,
+		spread = vector.new(25, 120, 25),
+		seed = 235,
+		octaves = 5,
+		persist = 1.8,
+		lacunarity = 3.5,
+		flags = "absvalue"
+	}
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"group:sand", "mcl_core:gravel", "mcl_mud:mud"},
+		sidelen = 80,
+		noise_params = noise,
+		biomes = warm_oceans,
+		y_min = coral_min,
+		y_max = coral_max,
+		schematic = mod_mcl_structures .. "/schematics/mcl_structures_coral_" .. c .. "_1.mts",
+		rotation = "random",
+		flags = "all_floors,force_placement",
+	})
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"group:sand", "mcl_core:gravel", "mcl_mud:mud"},
+		noise_params = noise,
+		sidelen = 80,
+		biomes = warm_oceans,
+		y_min = coral_min,
+		y_max = coral_max,
+		schematic = mod_mcl_structures .. "/schematics/mcl_structures_coral_" .. c .. "_2.mts",
+		rotation = "random",
+		flags = "all_floors,force_placement",
+	})
+
+	mcl_mapgen_core.register_decoration({
+		deco_type = "simple",
+		place_on = {"mcl_ocean:" .. c .. "_coral_block"},
+		sidelen = 16,
+		fill_ratio = 3,
+		y_min = coral_min,
+		y_max = coral_max,
+		decoration = "mcl_ocean:" .. c .. "_coral",
+		biomes = warm_oceans,
+		flags = "force_placement, all_floors",
+		height = 1,
+		height_max = 1,
+	})
+	mcl_mapgen_core.register_decoration({
+		deco_type = "simple",
+		place_on = {"mcl_ocean:horn_coral_block"},
+		sidelen = 16,
+		fill_ratio = 7,
+		y_min = coral_min,
+		y_max = coral_max,
+		decoration = "mcl_ocean:" .. c .. "_coral_fan",
+		biomes = warm_oceans,
+		flags = "force_placement, all_floors",
+		height = 1,
+		height_max = 1,
+	})
+end
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:sand", "mcl_core:gravel", "mcl_mud:mud"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.0085,
+		scale = 0.002,
+		spread = vector.new(25, 120, 25),
+		seed = 235,
+		octaves = 5,
+		persist = 1.8,
+		lacunarity = 3.5,
+		flags = "absvalue"
+	},
+	y_min = coral_min,
+	y_max = coral_max,
+	decoration = "mcl_ocean:dead_brain_coral_block",
+	biomes = warm_oceans,
+	flags = "force_placement",
+	height = 1,
+	height_max = 1,
+	place_offset_y = -1,
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_ocean:dead_brain_coral_block"},
+	sidelen = 16,
+	fill_ratio = 3,
+	y_min = coral_min,
+	y_max = coral_max,
+	decoration = "mcl_ocean:sea_pickle_1_dead_brain_coral_block",
+	biomes = warm_oceans,
+	flags = "force_placement, all_floors",
+	height = 1,
+	height_max = 1,
+	place_offset_y = -1,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_ocean:dead_brain_coral_block"},
+	sidelen = 16,
+	fill_ratio = 3,
+	y_min = coral_min,
+	y_max = coral_max,
+	decoration = "mcl_ocean:sea_pickle_2_dead_brain_coral_block",
+	biomes = warm_oceans,
+	flags = "force_placement, all_floors",
+	height = 1,
+	height_max = 1,
+	place_offset_y = -1,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_ocean:dead_brain_coral_block"},
+	sidelen = 16,
+	fill_ratio = 2,
+	y_min = coral_min,
+	y_max = coral_max,
+	decoration = "mcl_ocean:sea_pickle_3_dead_brain_coral_block",
+	biomes = warm_oceans,
+	flags = "force_placement, all_floors",
+	height = 1,
+	height_max = 1,
+	place_offset_y = -1,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_ocean:dead_brain_coral_block"},
+	sidelen = 16,
+	fill_ratio = 2,
+	y_min = coral_min,
+	y_max = coral_max,
+	decoration = "mcl_ocean:sea_pickle_4_dead_brain_coral_block",
+	biomes = warm_oceans,
+	flags = "force_placement, all_floors",
+	height = 1,
+	height_max = 1,
+	place_offset_y = -1,
+})
+--rare CORAl easter egg
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:sand", "mcl_core:gravel"},
+	fill_ratio = 0.0001,
+	sidelen = 80,
+	biomes = warm_oceans,
+	y_min = coral_min,
+	y_max = coral_max,
+	schematic = mod_mcl_structures .. "/schematics/coral_cora.mts",
+	rotation = "random",
+	flags = "all_floors,force_placement",
+})
+

mods/MAPGEN/vl_biomes/deco/fern.lua

@@ -0,0 +1,79 @@
+-- Template to register a grass or fern decoration
+local function register_fern_decoration(offset, scale, biomes)
+	for b = 1, #biomes do
+		local param2 = minetest.registered_biomes[biomes[b]]._mcl_grass_palette_index
+		mcl_mapgen_core.register_decoration({
+			deco_type = "simple",
+			priority = 1500,
+			place_on = {"group:grass_block_no_snow", "mcl_core:podzol", "mcl_mud:mud"},
+			sidelen = 16,
+			noise_params = {
+				offset = offset,
+				scale = scale,
+				spread = vector.new(200, 200, 200),
+				seed = 333,
+				octaves = 3,
+				persist = 0.6
+			},
+			biomes = {biomes[b]},
+			y_min = 1,
+			y_max = vl_biomes.overworld_max,
+			decoration = "mcl_flowers:fern",
+			param2 = param2,
+		})
+	end
+end
+
+local fern_minimal = {"Jungle", "JungleM", "JungleEdge", "JungleEdgeM", "Taiga", "MegaTaiga", "MegaSpruceTaiga", "ColdTaiga", "MangroveSwamp"}
+local fern_low = {"Jungle", "JungleM", "JungleEdge", "JungleEdgeM", "Taiga", "MegaTaiga", "MegaSpruceTaiga"}
+local fern_Jungle = {"Jungle", "JungleM", "JungleEdge", "JungleEdgeM"}
+--local fern_JungleM = { "JungleM" },
+
+-- FIXME: register once per biome only, with appropriate parameters?
+register_fern_decoration(-0.03, 0.09, fern_minimal)
+register_fern_decoration(-0.015, 0.075, fern_minimal)
+register_fern_decoration(0, 0.06, fern_minimal)
+register_fern_decoration(0.015, 0.045, fern_low)
+register_fern_decoration(0.03, 0.03, fern_low)
+register_fern_decoration(0.01, 0.05, fern_Jungle)
+register_fern_decoration(0.03, 0.03, fern_Jungle)
+register_fern_decoration(0.05, 0.01, fern_Jungle)
+register_fern_decoration(0.07, -0.01, fern_Jungle)
+register_fern_decoration(0.09, -0.03, fern_Jungle)
+register_fern_decoration(0.12, -0.03, {"JungleM"})
+
+-- Large ferns
+local function register_double_fern(offset, scale, biomes)
+	for b = 1, #biomes do
+		local param2 = minetest.registered_biomes[biomes[b]]._mcl_grass_palette_index
+		mcl_mapgen_core.register_decoration({
+			deco_type = "schematic",
+			priority = 1500,
+			schematic = {
+				size = vector.new(1, 3, 1),
+				data = {
+					{name = "air", prob = 0},
+					{name = "mcl_flowers:double_fern", param1 = 255, param2 = param2},
+					{name = "mcl_flowers:double_fern_top", param1 = 255, param2 = param2},
+				},
+			},
+			place_on = {"group:grass_block_no_snow", "mcl_core:podzol"},
+			sidelen = 16,
+			noise_params = {
+				offset = offset,
+				scale = scale,
+				spread = vector.new(250, 250, 250),
+				seed = 333,
+				octaves = 2,
+				persist = 0.66,
+			},
+			y_min = 1,
+			y_max = vl_biomes.overworld_max,
+			biomes = biomes[b],
+		})
+	end
+end
+
+register_double_fern(0.01, 0.03, {"Jungle", "JungleM", "JungleEdge", "JungleEdgeM", "Taiga", "ColdTaiga", "MegaTaiga", "MegaSpruceTaiga", "BambooJungle", "BambooJungleM", "BambooJungleEdge", "BambooJungleEdgeM", })
+register_double_fern(0.15, 0.1, {"JungleM", "BambooJungleM", "BambooJungle"})
+

mods/MAPGEN/vl_biomes/deco/flowers.lua

@@ -0,0 +1,86 @@
+-- Large flowers
+local function register_large_flower(name, biomes, seed, offset)
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		schematic = {
+			size = vector.new(1, 2, 1),
+			data = {
+				{name = "mcl_flowers:" .. name },
+				{name = "mcl_flowers:" .. name .. "_top" },
+			},
+		},
+		place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+		sidelen = 16,
+		noise_params = {
+			offset = offset,
+			scale = 0.01,
+			spread = vector.new(300, 300, 300),
+			seed = seed,
+			octaves = 5,
+			persist = 0.62,
+		},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		biomes = biomes,
+	})
+end
+
+register_large_flower("rose_bush", {"Forest"}, 9350, -0.008)
+register_large_flower("rose_bush", {"FlowerForest"}, 9350, 0.003)
+register_large_flower("peony", {"Forest"}, 10450, -0.008)
+register_large_flower("peony", {"FlowerForest"}, 10450, 0.003)
+register_large_flower("lilac", {"Forest"}, 10600, -0.007)
+register_large_flower("lilac", {"FlowerForest"}, 10600, 0.003)
+register_large_flower("sunflower", {"SunflowerPlains"}, 2940, 0.01)
+
+local function register_flower(name, biomes, seed, offset)
+	mcl_mapgen_core.register_decoration({
+		deco_type = "simple",
+		place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+		sidelen = 16,
+		noise_params = {
+			offset = offset,
+			scale = 0.006,
+			spread = vector.new(100, 100, 100),
+			seed = seed,
+			octaves = 3,
+			persist = 0.6
+		},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		biomes = biomes,
+		decoration = "mcl_flowers:" .. name,
+	})
+end
+
+local flower_biomes1 = {"Plains", "SunflowerPlains", "RoofedForest", "Forest", "BirchForest", "BirchForestM", "Taiga", "ColdTaiga", "Jungle", "JungleM", "JungleEdge", "JungleEdgeM", "Savanna", "SavannaM", "ExtremeHills", "ExtremeHillsM", "ExtremeHills+", "ExtremeHills+_snowtop"}
+
+register_flower("dandelion", flower_biomes1, 8, 0.0008)
+register_flower("dandelion", {"FlowerForest"}, 8, 0.032)
+register_flower("poppy", flower_biomes1, 9439, 0.0008)
+register_flower("poppy", {"FlowerForest"}, 9439, 0.032)
+register_flower("clover", flower_biomes1, 3, 0.0408) -- not in Flower Forest
+register_flower("fourleaf_clover", flower_biomes1, 13, -0.0012) -- not in Flower Forest
+
+local flower_biomes2 = {"Plains", "SunflowerPlains"}
+register_flower("tulip_red", flower_biomes2, 436, 0.0008)
+register_flower("tulip_red", {"FlowerForest"}, 436, 0.032)
+register_flower("tulip_orange", flower_biomes2, 536, 0.0008)
+register_flower("tulip_orange", {"FlowerForest"}, 536, 0.032)
+register_flower("tulip_pink", flower_biomes2, 636, 0.0008)
+register_flower("tulip_pink", {"FlowerForest"}, 636, 0.032)
+register_flower("tulip_white", flower_biomes2, 736, 0.0008)
+register_flower("tulip_white", {"FlowerForest"}, 736, 0.032)
+register_flower("azure_bluet", flower_biomes2, 800, 0.0008)
+register_flower("azure_bluet", {"FlowerForest"}, 800, 0.032)
+register_flower("oxeye_daisy", flower_biomes2, 3490, 0.0008)
+register_flower("oxeye_daisy", {"FlowerForest"}, 3490, 0.032)
+register_flower("cornflower", flower_biomes2, 486, 0.0008)
+register_flower("cornflower", {"FlowerForest"}, 486, 0.032)
+
+register_flower("lily_of_the_valley", {"Forest", "BirchForest", "BirchForestM", "RoofedForest"}, 325, 0.0008)
+register_flower("lily_of_the_valley", {"FlowerForest"}, 325, 0.032)
+
+register_flower("allium", {"FlowerForest"}, 836, 0.04008) -- Flower Forest only, until we have Meadows
+register_flower("blue_orchid", {"Swampland"}, 64500, 0.0008) -- Swamp only
+

mods/MAPGEN/vl_biomes/deco/mushrooms.lua

@@ -0,0 +1,70 @@
+-- Small mushrooms in caves
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:material_stone"},
+	sidelen = 80,
+	fill_ratio = 0.009,
+	noise_threshold = 2.0,
+	flags = "all_floors",
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_red",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:material_stone"},
+	sidelen = 80,
+	fill_ratio = 0.009,
+	noise_threshold = 2.0,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_brown",
+})
+
+-- Mushrooms next to trees
+local mushrooms = {"mcl_mushrooms:mushroom_red", "mcl_mushrooms:mushroom_brown"}
+local mseeds = {7133, 8244}
+for m = 1, #mushrooms do
+	-- Mushrooms next to trees
+	mcl_mapgen_core.register_decoration({
+		deco_type = "simple",
+		place_on = {"group:grass_block_no_snow", "mcl_core:dirt", "mcl_core:podzol", "mcl_core:mycelium", "mcl_core:stone", "mcl_core:andesite", "mcl_core:diorite", "mcl_core:granite"},
+		sidelen = 16,
+		noise_params = {
+			offset = 0,
+			scale = 0.003,
+			spread = vector.new(250, 250, 250),
+			seed = mseeds[m],
+			octaves = 3,
+			persist = 0.66,
+		},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		decoration = mushrooms[m],
+		spawn_by = {"mcl_core:tree", "mcl_core:sprucetree", "mcl_core:darktree", "mcl_core:birchtree"},
+		num_spawn_by = 1,
+		priority = 1150,
+	})
+
+	-- More mushrooms in Swampland
+	mcl_mapgen_core.register_decoration({
+		deco_type = "simple",
+		place_on = {"group:grass_block_no_snow", "mcl_core:dirt", "mcl_core:podzol", "mcl_core:mycelium", "mcl_core:stone", "mcl_core:andesite", "mcl_core:diorite", "mcl_core:granite"},
+		sidelen = 16,
+		noise_params = {
+			offset = 0.05,
+			scale = 0.003,
+			spread = vector.new(250, 250, 250),
+			seed = mseeds[m],
+			octaves = 3,
+			persist = 0.6,
+		},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		decoration = mushrooms[m],
+		biomes = {"Swampland"},
+		spawn_by = {"mcl_core:tree", "mcl_core:sprucetree", "mcl_core:darktree", "mcl_core:birchtree"},
+		num_spawn_by = 1,
+		priority = 1150,
+	})
+end

mods/MAPGEN/vl_biomes/deco/pumpkin.lua

@@ -0,0 +1,20 @@
+-- Pumpkin
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	decoration = "mcl_farming:pumpkin",
+	param2 = 0,
+	param2_max = 3,
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.016,
+		scale = 0.01332,
+		spread = vector.new(125, 125, 125),
+		seed = 666,
+		octaves = 6,
+		persist = 0.666
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	biomes = {"ExtremeHills", "ExtremeHillsM", "ExtremeHills+", "Taiga", "MegaTaiga", "MegaSpruceTaiga", "Plains", "SunflowerPlains", "Swampland", "MangroveSwamp"},
+})

mods/MAPGEN/vl_biomes/deco/reeds.lua

@@ -0,0 +1,43 @@
+-- Sugar canes
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:dirt", "mcl_core:coarse_dirt", "group:grass_block_no_snow", "group:sand", "mcl_core:podzol", "mcl_core:reeds"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.3,
+		scale = 0.7,
+		spread = vector.new(200, 200, 200),
+		seed = 2,
+		octaves = 3,
+		persist = 0.7
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_core:reeds",
+	height = 1,
+	height_max = 3,
+	spawn_by = {"mcl_core:water_source", "group:frosted_ice"}, -- TODO: river water source, too?
+	num_spawn_by = 1,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:dirt", "mcl_core:coarse_dirt", "group:grass_block_no_snow", "group:sand", "mcl_core:podzol", "mcl_core:reeds"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.0,
+		scale = 0.5,
+		spread = vector.new(200, 200, 200),
+		seed = 2,
+		octaves = 3,
+		persist = 0.7,
+	},
+	biomes = {"Swampland", "Swampland_shore"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_core:reeds",
+	height = 1,
+	height_max = 3,
+	spawn_by = {"mcl_core:water_source", "group:frosted_ice"},
+	num_spawn_by = 1,
+})
+

mods/MAPGEN/vl_biomes/deco/seagrass_kelp.lua

@@ -0,0 +1,155 @@
+-- TODO: move to mcl_ocean?
+local function register_seagrass_decoration(grasstype, offset, scale, biomes)
+	local seed, nodes, surfaces, param2, param2_max, y_max
+	if grasstype == "seagrass" then
+		seed = 16
+		surfaces = {"mcl_core:dirt", "mcl_core:sand", "mcl_core:gravel", "mcl_core:redsand"}
+		nodes = {"mcl_ocean:seagrass_dirt", "mcl_ocean:seagrass_sand", "mcl_ocean:seagrass_gravel", "mcl_ocean:seagrass_redsand"}
+		y_max = 0
+	elseif grasstype == "kelp" then
+		seed = 32
+		param2 = 16
+		param2_max = 96
+		surfaces = {"mcl_core:dirt", "mcl_core:sand", "mcl_core:gravel"}
+		nodes = {"mcl_ocean:kelp_dirt", "mcl_ocean:kelp_sand", "mcl_ocean:kelp_gravel"}
+		y_max = -6
+	end
+	local noise = {
+		offset = offset,
+		scale = scale,
+		spread = vector.new(100, 100, 100),
+		seed = seed,
+		octaves = 3,
+		persist = 0.6,
+	}
+
+	for s = 1, #surfaces do
+		mcl_mapgen_core.register_decoration({
+			deco_type = "simple",
+			priority = 1500,
+			place_on = {surfaces[s]},
+			sidelen = 16,
+			noise_params = noise,
+			biomes = biomes,
+			y_min = vl_biomes.DEEP_OCEAN_MIN,
+			y_max = y_max,
+			decoration = nodes[s],
+			param2 = param2,
+			param2_max = param2_max,
+			place_offset_y = -1,
+			flags = "force_placement",
+		})
+	end
+end
+
+-- TODO: use temperature classes, rather than hardcoding biome lists here?
+-- Also would allow for more/less seagrass depending on temperature class
+register_seagrass_decoration("seagrass", 0, 0.5, {
+	"ColdTaiga_ocean",
+	"ExtremeHills_ocean",
+	"ExtremeHillsM_ocean",
+	"ExtremeHills+_ocean",
+	"Taiga_ocean",
+	"MegaTaiga_ocean",
+	"MegaSpruceTaiga_ocean",
+	"StoneBeach_ocean",
+	"Plains_ocean",
+	"SunflowerPlains_ocean",
+	"Forest_ocean",
+	"FlowerForest_ocean",
+	"BirchForest_ocean",
+	"BirchForestM_ocean",
+	"RoofedForest_ocean",
+	"Swampland_ocean",
+	"Jungle_ocean",
+	"JungleM_ocean",
+	"JungleEdge_ocean",
+	"JungleEdgeM_ocean",
+	"MushroomIsland_ocean",
+	"Desert_ocean",
+	"Savanna_ocean",
+	"SavannaM_ocean",
+	"Mesa_ocean",
+	"MesaBryce_ocean",
+	"MesaPlateauF_ocean",
+	"MesaPlateauFM_ocean",
+
+	"ColdTaiga_deep_ocean",
+	"ExtremeHills_deep_ocean",
+	"ExtremeHillsM_deep_ocean",
+	"ExtremeHills+_deep_ocean",
+	"Taiga_deep_ocean",
+	"MegaTaiga_deep_ocean",
+	"MegaSpruceTaiga_deep_ocean",
+	"StoneBeach_deep_ocean",
+	"Plains_deep_ocean",
+	"SunflowerPlains_deep_ocean",
+	"Forest_deep_ocean",
+	"FlowerForest_deep_ocean",
+	"BirchForest_deep_ocean",
+	"BirchForestM_deep_ocean",
+	"RoofedForest_deep_ocean",
+	"Swampland_deep_ocean",
+	"Jungle_deep_ocean",
+	"JungleM_deep_ocean",
+	"JungleEdge_deep_ocean",
+	"JungleEdgeM_deep_ocean",
+	"MushroomIsland_deep_ocean",
+	"Desert_deep_ocean",
+	"Savanna_deep_ocean",
+	"SavannaM_deep_ocean",
+	"Mesa_deep_ocean",
+	"MesaBryce_deep_ocean",
+	"MesaPlateauF_deep_ocean",
+	"MesaPlateauFM_deep_ocean",
+
+	"Mesa_sandlevel",
+	"MesaBryce_sandlevel",
+	"MesaPlateauF_sandlevel",
+	"MesaPlateauFM_sandlevel",
+	"Swampland_shore",
+	"Jungle_shore",
+	"JungleM_shore",
+	"Savanna_beach",
+	"FlowerForest_beach",
+	"ColdTaiga_beach_water",
+	"ExtremeHills_beach",
+})
+
+register_seagrass_decoration("kelp", -0.5, 1, {
+	"ExtremeHillsM_ocean",
+	"ExtremeHills+_ocean",
+	"MegaTaiga_ocean",
+	"MegaSpruceTaiga_ocean",
+	"Plains_ocean",
+	"SunflowerPlains_ocean",
+	"Forest_ocean",
+	"FlowerForest_ocean",
+	"BirchForest_ocean",
+	"BirchForestM_ocean",
+	"RoofedForest_ocean",
+	"Swampland_ocean",
+	"Jungle_ocean",
+	"JungleM_ocean",
+	"JungleEdge_ocean",
+	"JungleEdgeM_ocean",
+	"MushroomIsland_ocean",
+
+	"ExtremeHillsM_deep_ocean",
+	"ExtremeHills+_deep_ocean",
+	"MegaTaiga_deep_ocean",
+	"MegaSpruceTaiga_deep_ocean",
+	"Plains_deep_ocean",
+	"SunflowerPlains_deep_ocean",
+	"Forest_deep_ocean",
+	"FlowerForest_deep_ocean",
+	"BirchForest_deep_ocean",
+	"BirchForestM_deep_ocean",
+	"RoofedForest_deep_ocean",
+	"Swampland_deep_ocean",
+	"Jungle_deep_ocean",
+	"JungleM_deep_ocean",
+	"JungleEdge_deep_ocean",
+	"JungleEdgeM_deep_ocean",
+	"MushroomIsland_deep_ocean",
+})

mods/MAPGEN/vl_biomes/deco/snowy_dirt.lua

@@ -0,0 +1,11 @@
+--Snow layer on snowy dirt
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:dirt_with_grass_snow"},
+	sidelen = 80,
+	fill_ratio = 10,
+	flags = "all_floors",
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_core:snow",
+})

mods/MAPGEN/vl_biomes/deco/sweet_berry.lua

@@ -0,0 +1,20 @@
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:dirt_with_grass", "mcl_core:podzol"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0,
+		scale = 0.012,
+		spread = vector.new(100, 100, 100),
+		seed = 354,
+		octaves = 1,
+		persist = 0.5,
+		lacunarity = 1.0,
+		flags = "absvalue"
+	},
+	biomes = {"Taiga", "ColdTaiga", "MegaTaiga", "MegaSpruceTaiga", "Forest"},
+	y_max = vl_biomes.overworld_max,
+	y_min = 2,
+	decoration = "mcl_sweet_berry:sweet_berry_bush_3"
+})
+

mods/MAPGEN/vl_biomes/deco/tallgrass.lua

@@ -0,0 +1,110 @@
+-- Template to register a grass decoration
+local function register_grass_decoration(offset, scale, biomes)
+	for b = 1, #biomes do
+		local param2 = minetest.registered_biomes[biomes[b]]._mcl_grass_palette_index
+		mcl_mapgen_core.register_decoration({
+			deco_type = "simple",
+			priority = 1500,
+			place_on = {"group:grass_block_no_snow", "mcl_mud:mud"},
+			sidelen = 16,
+			noise_params = {
+				offset = offset,
+				scale = scale,
+				spread = vector.new(200, 200, 200),
+				seed = 420,
+				octaves = 3,
+				persist = 0.6
+			},
+			biomes = { biomes[b] },
+			y_min = 1,
+			y_max = vl_biomes.overworld_max,
+			decoration = "mcl_flowers:tallgrass",
+			param2 = param2,
+		})
+	end
+end
+
+local grass_forest = {"Plains", "Taiga", "Forest", "FlowerForest", "BirchForest", "BirchForestM", "RoofedForest", "Swampland", }
+local grass_mpf = {"MesaPlateauF_grasstop"}
+local grass_plains = {"Plains", "SunflowerPlains", "JungleEdge", "JungleEdgeM", "MangroveSwamp"}
+local grass_savanna = {"Savanna", "SavannaM"}
+local grass_sparse = {"ExtremeHills", "ExtremeHills+", "ExtremeHills+_snowtop", "ExtremeHillsM", "Jungle"}
+local grass_mpfm = {"MesaPlateauFM_grasstop"}
+
+-- TODO: register only once for each biome, with better parameters?
+register_grass_decoration(-0.03, 0.09, grass_forest)
+register_grass_decoration(-0.015, 0.075, grass_forest)
+register_grass_decoration(0, 0.06, grass_forest)
+register_grass_decoration(0.015, 0.045, grass_forest)
+register_grass_decoration(0.03, 0.03, grass_forest)
+register_grass_decoration(-0.03, 0.09, grass_mpf)
+register_grass_decoration(-0.015, 0.075, grass_mpf)
+register_grass_decoration(0, 0.06, grass_mpf)
+register_grass_decoration(0.01, 0.045, grass_mpf)
+register_grass_decoration(0.01, 0.05, grass_forest)
+register_grass_decoration(0.03, 0.03, grass_plains)
+register_grass_decoration(0.05, 0.01, grass_plains)
+register_grass_decoration(0.07, -0.01, grass_plains)
+register_grass_decoration(0.09, -0.03, grass_plains)
+register_grass_decoration(0.18, -0.03, grass_savanna)
+register_grass_decoration(0.05, -0.03, grass_sparse)
+register_grass_decoration(0.05, 0.05, grass_mpfm)
+register_grass_decoration(-0.03, 1, {"BambooJungle", "BambooJungleM", "BambooJungleEdge"})
+
+-- Doubletall grass registration helper
+local function register_doubletall_grass(offset, scale, biomes)
+	for b = 1, #biomes do
+		local param2 = minetest.registered_biomes[biomes[b]]._mcl_grass_palette_index
+		mcl_mapgen_core.register_decoration({
+			deco_type = "schematic",
+			priority = 1500,
+			schematic = {
+				size = vector.new(1, 3, 1),
+				data = {
+					{name = "air", prob = 0},
+					{name = "mcl_flowers:double_grass", param1 = 255, param2 = param2},
+					{name = "mcl_flowers:double_grass_top", param1 = 255, param2 = param2},
+				},
+			},
+			place_on = {"group:grass_block_no_snow"},
+			sidelen = 16,
+			noise_params = {
+				offset = offset,
+				scale = scale,
+				spread = vector.new(200, 200, 200),
+				seed = 420,
+				octaves = 3,
+				persist = 0.6,
+			},
+			y_min = 1,
+			y_max = vl_biomes.overworld_max,
+			biomes = biomes,
+		})
+	end
+end
+
+register_doubletall_grass(-0.0005, -0.3, {"BambooJungle", "BambooJungleM", "BambooJungleEdge"})
+register_doubletall_grass(-0.01, 0.03, {"Forest", "FlowerForest", "BirchForest", "BirchForestM", "RoofedForest", "Taiga"})
+register_doubletall_grass(-0.002, 0.03, {"Plains", "SunflowerPlains"})
+register_doubletall_grass(-0.0005, -0.03, {"Savanna", "SavannaM"})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	priority = 1500,
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0,
+		scale = 0.012,
+		spread = vector.new(100, 100, 100),
+		seed = 354,
+		octaves = 1,
+		persist = 0.5,
+		lacunarity = 1.0,
+		flags = "absvalue"
+	},
+	biomes = {"BambooJungle", "BambooJungleEdge","BambooJungleM", "BambooJungleEdge"},
+	y_max = vl_biomes.overworld_max,
+	y_min = 1,
+	decoration = "mcl_flowers:tallgrass"
+})

mods/MAPGEN/vl_biomes/desert.lua

@@ -0,0 +1,45 @@
+-- Desert
+vl_biomes.register_biome({
+	name = "Desert",
+	node_top = "mcl_core:sand",
+	depth_top = 1,
+	node_filler = "mcl_core:sand",
+	depth_filler = 2,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	node_stone = "mcl_core:sandstone",
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 26,
+	heat_point = 94,
+	_mcl_biome_type = "hot",
+	_mcl_water_temp = "warm",
+	_mcl_grass_palette_index = 17,
+	_mcl_foliage_palette_index = 3,
+	_mcl_water_palette_index = 3,
+	_mcl_skycolor = "#6EB1FF",
+	_ocean = {
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+	}
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	priority = 1500,
+	place_on = {"group:sand", "group:hardened_clay"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.01,
+		scale = 0.006,
+		spread = vector.new(100, 100, 100),
+		seed = 1972,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	biomes = {"Desert"},
+	decoration = "mcl_core:deadbush",
+	height = 1,
+})

mods/MAPGEN/vl_biomes/end/end.lua

@@ -0,0 +1,326 @@
+local mg_seed = minetest.get_mapgen_setting("seed")
+
+vl_biomes.register_biome({
+	name = "End",
+	node_stone = "air",
+	node_filler = "air",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.end_min,
+	y_max = vl_biomes.end_max + 80,
+	heat_point = 1000, --ridiculously high values so End Island always takes precedent
+	humidity_point = 1000,
+	vertical_blend = 16,
+	_mcl_biome_type = "medium",
+	_mcl_grass_palette_index = 0,
+	_mcl_foliage_palette_index = 0,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.end_skycolor,
+	_mcl_fogcolor = vl_biomes.end_fogcolor
+})
+vl_biomes.register_biome({
+	name = "EndBarrens",
+	node_stone = "air",
+	node_filler = "air",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.end_min,
+	y_max = vl_biomes.end_max + 80,
+	heat_point = 1000,
+	humidity_point = 1000,
+	vertical_blend = 16,
+	_mcl_biome_type = "medium",
+	_mcl_grass_palette_index = 0,
+	_mcl_foliage_palette_index = 0,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.end_skycolor,
+	_mcl_fogcolor = vl_biomes.end_fogcolor
+})
+vl_biomes.register_biome({
+	name = "EndMidlands",
+	node_stone = "air",
+	node_filler = "air",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.end_min,
+	y_max = vl_biomes.end_max + 80,
+	heat_point = 1000,
+	humidity_point = 1000,
+	vertical_blend = 16,
+	_mcl_biome_type = "medium",
+	_mcl_grass_palette_index = 0,
+	_mcl_foliage_palette_index = 0,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.end_skycolor,
+	_mcl_fogcolor = vl_biomes.end_fogcolor
+})
+vl_biomes.register_biome({
+	name = "EndHighlands",
+	node_stone = "air",
+	node_filler = "air",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.end_min,
+	y_max = vl_biomes.end_max + 80,
+	heat_point = 1000,
+	humidity_point = 1000,
+	vertical_blend = 16,
+	_mcl_biome_type = "medium",
+	_mcl_grass_palette_index = 0,
+	_mcl_foliage_palette_index = 0,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.end_skycolor,
+	_mcl_fogcolor = vl_biomes.end_fogcolor
+})
+vl_biomes.register_biome({
+	name = "EndSmallIslands",
+	node_stone = "air",
+	node_filler = "air",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.end_min,
+	y_max = vl_biomes.end_max + 80,
+	heat_point = 1000,
+	humidity_point = 1000,
+	vertical_blend = 16,
+	_mcl_biome_type = "medium",
+	_mcl_grass_palette_index = 0,
+	_mcl_foliage_palette_index = 0,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.end_skycolor,
+	_mcl_fogcolor = vl_biomes.end_fogcolor
+})
+
+vl_biomes.register_biome({
+	name = "EndBorder",
+	node_stone = "air",
+	node_filler = "air",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.end_min,
+	y_max = vl_biomes.end_max + 80,
+	heat_point = 500,
+	humidity_point = 500,
+	vertical_blend = 16,
+	max_pos = vector.new(1250, vl_biomes.end_min + 512, 1250),
+	min_pos = vector.new(-1250, vl_biomes.end_min, -1250),
+	_mcl_biome_type = "medium",
+	_mcl_grass_palette_index = 0,
+	_mcl_foliage_palette_index = 0,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.end_skycolor,
+	_mcl_fogcolor = vl_biomes.end_fogcolor
+})
+
+vl_biomes.register_biome({
+	name = "EndIsland",
+	node_stone = "air",
+	node_filler = "air",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	max_pos = vector.new(650, vl_biomes.end_min + 512, 650),
+	min_pos = vector.new(-650, vl_biomes.end_min, -650),
+	heat_point = 50,
+	humidity_point = 50,
+	vertical_blend = 16,
+	_mcl_biome_type = "medium",
+	_mcl_grass_palette_index = 0,
+	_mcl_foliage_palette_index = 0,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.end_skycolor,
+	_mcl_fogcolor = vl_biomes.end_fogcolor
+})
+
+-- Generate fake End
+-- TODO: Remove the "ores" when there's a better End generator
+-- FIXME: Broken lighting in v6 mapgen
+local mg_name = minetest.get_mapgen_setting("mg_name")
+local end_wherein = mg_name == "v6" and {"air", "mcl_core:stone"} or {"air"}
+
+minetest.register_ore({
+	ore_type = "stratum",
+	ore = "mcl_end:end_stone",
+	wherein = end_wherein,
+	biomes = {"EndSmallIslands", "Endborder"},
+	y_min = vl_biomes.end_min + 64,
+	y_max = vl_biomes.end_min + 80,
+	clust_num_ores = 3375,
+	clust_size = 15,
+
+	noise_params = {
+		offset = vl_biomes.end_min + 70,
+		scale = -1,
+		spread = vector.new(84, 84, 84),
+		seed = 145,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		--flags = "defaults",
+	},
+
+	np_stratum_thickness = {
+		offset = 0,
+		scale = 15,
+		spread = vector.new(84, 84, 84),
+		seed = 145,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		--flags = "defaults",
+	},
+	clust_scarcity = 1,
+})
+
+minetest.register_ore({
+	ore_type = "stratum",
+	ore = "mcl_end:end_stone",
+	wherein = end_wherein,
+	biomes = {"End", "EndMidlands", "EndHighlands", "EndBarrens"},
+	y_min = vl_biomes.end_min + 64,
+	y_max = vl_biomes.end_min + 80,
+
+	noise_params = {
+		offset = vl_biomes.end_min + 70,
+		scale = -1,
+		spread = vector.new(126, 126, 126),
+		seed = mg_seed + 9999,
+		octaves = 3,
+		persist = 0.5,
+	},
+
+	np_stratum_thickness = {
+		offset = -2,
+		scale = 10,
+		spread = vector.new(126, 126, 126),
+		seed = mg_seed + 9999,
+		octaves = 3,
+		persist = 0.5,
+	},
+	clust_scarcity = 1,
+})
+
+minetest.register_ore({
+	ore_type = "stratum",
+	ore = "mcl_end:end_stone",
+	wherein = end_wherein,
+	biomes = {"End", "EndMidlands", "EndHighlands", "EndBarrens"},
+	y_min = vl_biomes.end_min + 64,
+	y_max = vl_biomes.end_min + 80,
+
+	noise_params = {
+		offset = vl_biomes.end_min + 72,
+		scale = -3,
+		spread = vector.new(84, 84, 84),
+		seed = mg_seed + 999,
+		octaves = 4,
+		persist = 0.8,
+	},
+
+	np_stratum_thickness = {
+		offset = -4,
+		scale = 10,
+		spread = vector.new(84, 84, 84),
+		seed = mg_seed + 999,
+		octaves = 4,
+		persist = 0.8,
+	},
+	clust_scarcity = 1,
+})
+minetest.register_ore({
+	ore_type = "stratum",
+	ore = "mcl_end:end_stone",
+	wherein = end_wherein,
+	biomes = {"End", "EndMidlands", "EndHighlands", "EndBarrens"},
+	y_min = vl_biomes.end_min + 64,
+	y_max = vl_biomes.end_min + 80,
+
+	noise_params = {
+		offset = vl_biomes.end_min + 70,
+		scale = -2,
+		spread = vector.new(84, 84, 84),
+		seed = mg_seed + 99,
+		octaves = 4,
+		persist = 0.85,
+	},
+
+	np_stratum_thickness = {
+		offset = -3,
+		scale = 5,
+		spread = vector.new(63, 63, 63),
+		seed = mg_seed + 50,
+		octaves = 4,
+		persist = 0.85,
+	},
+	clust_scarcity = 1,
+})
+
+-- Chorus plant
+mcl_mapgen_core.register_decoration({
+	name = "mcl_biomes:chorus",
+	deco_type = "simple",
+	place_on = {"mcl_end:end_stone"},
+	flags = "all_floors",
+	sidelen = 16,
+	noise_params = {
+		offset = -0.012,
+		scale = 0.024,
+		spread = vector.new(100, 100, 100),
+		seed = 257,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = vl_biomes.end_min,
+	y_max = vl_biomes.end_max,
+	decoration = "mcl_end:chorus_plant",
+	height = 1,
+	height_max = 8,
+	biomes = {"End", "EndMidlands", "EndHighlands", "EndBarrens", "EndSmallIslands"},
+})
+mcl_mapgen_core.register_decoration({
+	name = "mcl_biomes:chorus_plant",
+	deco_type = "simple",
+	place_on = {"mcl_end:chorus_plant"},
+	flags = "all_floors",
+	sidelen = 16,
+	fill_ratio = 10,
+	--[[noise_params = {
+		offset = -0.012,
+		scale = 0.024,
+		spread = vector.new(100, 100, 100),
+		seed = 257,
+		octaves = 3,
+		persist = 0.6
+	},--]]
+	y_min = vl_biomes.end_min,
+	y_max = vl_biomes.end_max,
+	decoration = "mcl_end:chorus_flower",
+	height = 1,
+	biomes = {"End", "EndMidlands", "EndHighlands", "EndBarrens", "EndSmallIslands"},
+	gen_callback = function(t, minp, maxp, blockseed)
+		local pr = PcgRandom(blockseed + mg_seed + 99682)
+		for _, pos in ipairs(t) do
+			local x, y, z = pos.x, pos.y, pos.z
+			if x < -10 or x > 10 or z < -10 or z > 10 then
+				local realpos = vector.new(x, y + 1, z)
+				local node = minetest.get_node(realpos)
+				if node and node.name == "mcl_end:chorus_flower" then
+					mcl_end.grow_chorus_plant(realpos, node, pr)
+				end
+			end
+		end
+	end,
+})

mods/MAPGEN/vl_biomes/forest.lua

@@ -0,0 +1,168 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+-- Forest
+vl_biomes.register_biome({
+	name = "Forest",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 61,
+	heat_point = 45,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "ocean",
+	_mcl_grass_palette_index = 13,
+	_mcl_foliage_palette_index = 7,
+	_mcl_water_palette_index = 0,
+	_mcl_skycolor = "#79A6FF",
+	_beach = {
+		node_top = "mcl_core:sand",
+		depth_top = 2,
+		node_filler = "mcl_core:sandstone",
+		depth_filler = 1,
+		y_min = -1,
+		y_max = 0,
+		_mcl_foliage_palette_index = 1,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		y_max = -2,
+	},
+})
+
+for i = 1, 4 do
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+		sidelen = 80,
+		noise_params = {
+			offset = 0.000545,
+			scale = 0.0011,
+			spread = vector.new(250, 250, 250),
+			seed = 3 + 5 * i,
+			octaves = 3,
+			persist = 0.66
+		},
+		biomes = {"Forest"},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		schematic = mod_mcl_core .. "/schematics/mcl_core_oak_large_"..i..".mts",
+		flags = "place_center_x, place_center_z",
+		rotation = "random",
+	})
+end
+
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.025,
+		scale = 0.0022,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.66
+	},
+	biomes = {"Forest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	--[[noise_params = {
+		offset = 0.01,
+		scale = 0.00001,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.33
+	},]]
+	fill_ratio = 0.00002,
+	biomes = {"Forest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic_bee_nest.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+	spawn_by = "group:flower",
+	priority = 1550,
+})
+
+-- Rare balloon oak
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.002083,
+		scale = 0.0022,
+		spread = vector.new(250, 250, 250),
+		seed = 3,
+		octaves = 3,
+		persist = 0.6,
+	},
+	biomes = {"Forest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_balloon.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Birch
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.000333,
+		scale = -0.0015,
+		spread = vector.new(250, 250, 250),
+		seed = 11,
+		octaves = 3,
+		persist = 0.66
+	},
+	biomes = {"Forest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_birch.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	--[[noise_params = {
+		offset = 0.01,
+		scale = 0.00001,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.33
+	},]]--
+	fill_ratio = 0.00002,
+	biomes = {"Forest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_birch_bee_nest.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+	spawn_by = "group:flower",
+	priority = 1550,
+})
+

mods/MAPGEN/vl_biomes/forest_flower.lua

@@ -0,0 +1,100 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+-- Flower Forest
+vl_biomes.register_biome({
+	name = "FlowerForest",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 44,
+	heat_point = 32,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "ocean",
+	_mcl_grass_palette_index = 14,
+	_mcl_foliage_palette_index = 7,
+	_mcl_water_palette_index = 0,
+	_mcl_skycolor = "#79A6FF",
+	_beach = {
+		node_top = "mcl_core:sand",
+		depth_top = 2,
+		node_filler = "mcl_core:sandstone",
+		depth_filler = 1,
+		y_min = -2,
+		y_max = 2,
+		_mcl_foliage_palette_index = 1,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		y_max = -3,
+	},
+})
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.01,
+		scale = 0.0022,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.66
+	},
+	biomes = {"FlowerForest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	--[[noise_params = {
+		offset = 0.01,
+		scale = 0.00001,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.33
+	},]]--
+	fill_ratio = 0.0002,
+	biomes = {"FlowerForest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic_bee_nest.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+	spawn_by = "group:flower",
+	priority = 1550,
+})
+
+-- Birch
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.000333,
+		scale = -0.0015,
+		spread = vector.new(250, 250, 250),
+		seed = 11,
+		octaves = 3,
+		persist = 0.66
+	},
+	biomes = {"FlowerForest"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_birch.mts",
+	flags = "place_center_x, place_center_z",
+})

mods/MAPGEN/vl_biomes/init.lua

@@ -0,0 +1,347 @@
+local modname = minetest.get_current_modname()
+local modpath = minetest.get_modpath(modname)
+-- Future biomes API, work in progress
+vl_biomes = {}
+
+vl_biomes.overworld_fogcolor = "#C0D8FF"
+vl_biomes.beach_skycolor = "#78A7FF" -- This is the case for all beach biomes except for the snowy ones! Those beaches will have their own colour instead of this one.
+vl_biomes.ocean_skycolor = "#7BA4FF" -- This is the case for all ocean biomes except for non-deep frozen oceans! Those oceans will have their own colour instead of this one.
+
+vl_biomes.nether_skycolor = "#6EB1FF" -- The Nether biomes seemingly don't use the sky colour, despite having this value according to the wiki. The fog colour is used for both sky and fog.
+
+vl_biomes.end_skycolor = "#000000"
+vl_biomes.end_fogcolor = "#A080A0" -- The End biomes seemingly don't use the fog colour, despite having this value according to the wiki. The sky colour is used for both sky and fog.
+
+-- Colors of underwater fog effect, defaults for temperatures
+-- Swamp and Mangrove Swamp differ
+local waterfogcolor = { warm = "#43D5EE", lukewarm = "#45ADF2", ocean = "#3F76E4", cold = "#3D57D6", frozen = "#3938C9" }
+
+vl_biomes.overworld_min = mcl_vars.mg_overworld_min
+vl_biomes.overworld_max = mcl_vars.mg_overworld_max
+vl_biomes.nether_min = mcl_vars.mg_nether_min
+vl_biomes.lava_nether_max = mcl_vars.mg_lava_nether_max
+vl_biomes.nether_deco_max = mcl_vars.mg_nether_deco_max
+vl_biomes.nether_max = mcl_vars.mg_nether_max
+vl_biomes.end_min = mcl_vars.mg_end_min
+vl_biomes.end_max = mcl_vars.mg_end_max
+
+vl_biomes.OCEAN_MIN = -15
+vl_biomes.DEEP_OCEAN_MAX = vl_biomes.OCEAN_MIN - 1
+vl_biomes.DEEP_OCEAN_MIN = -31
+
+local mg_name = minetest.get_mapgen_setting("mg_name")
+local superflat = mg_name == "flat" and minetest.get_mapgen_setting("mcl_superflat_classic") == "true"
+
+-- Biomes by water temperature, for decorations and structures
+vl_biomes.by_water_temp = {}
+
+-- Register a biome
+-- This API has a few extensions over minetest.register_biome:
+--
+-- - _mcl_skycolor affects sky color
+-- - _mcl_waterfogcolor affects sky color depending on weather
+-- - _mcl_biome_type = "snowy", "cold", "medium" or "hot" affects weather
+-- - _mcl_foliage_palette_index affects tree colors
+-- - _mcl_grass_palette_index affects grass color
+-- - _mcl_water_palette_index affects water color
+-- - some default values
+-- - subbiomes that inherit from defaults or their parents
+--
+-- TODO: add a "_mcl_world" parameter to set defaults for y_min, y_max, and ensure bounds?
+vl_biomes.register_biome = function(def)
+	local is_overworld = (def.y_min or def.min_pos.y) >= vl_biomes.overworld_min - 5 and (def.y_max or def.max_pos.y) <= vl_biomes.overworld_max + 5
+	if is_overworld then
+		-- some defaults:
+		if def._mcl_fogcolor == nil then def._mcl_fogcolor = vl_biomes.overworld_fogcolor end
+		if def._beach and def._beach._mcl_skycolor == nil then def._beach._mcl_skycolor = vl_biomes.beach_skycolor end
+		if def._ocean then
+			local odef = def._ocean
+			if odef._mcl_skycolor == nil then odef._mcl_skycolor = vl_biomes.ocean_skycolor end
+			if odef._mcl_water_temp == nil or odef._mcl_water_temp == "default" then odef._mcl_water_temp = "ocean" end
+			if odef._mcl_waterfogcolor == nil then odef._mcl_waterfogcolor = waterfogcolor[odef._mcl_water_temp] end
+			if odef.y_min == nil and not odef.min_pos then odef.y_min = vl_biomes.OCEAN_MIN end
+			if odef.y_max == nil and not odef.max_pos then odef.y_max = 0 end
+			if odef._mcl_foliage_palette_index == nil then odef._mcl_foliage_palette_index = 0 end -- no param2 updates
+		end
+		-- add deep ocean automatically
+		if def._deep_ocean == nil then
+			-- TODO: y_min, y_max only if not min_pos, max_pos
+			def._deep_ocean = {
+				y_min = vl_biomes.DEEP_OCEAN_MIN,
+				y_max = vl_biomes.DEEP_OCEAN_MAX,
+				node_top = def._ocean.node_top or def.node_top,
+				depth_top = 2,
+				node_filler = def._ocean.node_filler or def.node_filler,
+				depth_filler = 3,
+				node_riverbed = def._ocean.node_riverbed or def.node_riverbed,
+				depth_riverbed = 2,
+				vertical_blend = 5,
+				_mcl_foliage_palette_index = 0, -- to avoid running the foliage fix
+				_mcl_skycolor = vl_biomes.ocean_skycolor,
+			}
+		end
+		-- Underground biomes are used to identify the underground and to prevent nodes from the surface
+		-- (sand, dirt) from leaking into the underground.
+		if def._underground == nil then
+			-- TODO: y_min, y_max only if not min_pos, max_pos
+			def._underground = {
+				node_top = def._ocean.node_top or def.node_top,
+				depth_top = 2,
+				node_filler = def._ocean.node_filler or def.node_filler,
+				depth_filler = 3,
+				node_riverbed = def._ocean.node_riverbed or def.node_riverbed,
+				depth_riverbed = 2,
+				y_min = vl_biomes.overworld_min,
+				y_max = vl_biomes.DEEP_OCEAN_MIN - 1,
+			}
+		end
+	end
+	-- subbiomes
+	local subbiomes = {}
+	for k, sdef in pairs(def) do
+		-- currently, all _tables are subbiomes
+		-- TODO: more precise check, or use _subbiomes = {}?
+		if k:sub(1,1) == "_" and type(sdef) == "table" then
+			-- subbiome name
+			if not sdef.name then sdef.name = def.name .. k end
+			-- merge from parent
+			for k2, v2 in pairs(def) do
+				if type(v2) ~= "table" and sdef[k2] == nil then
+					sdef[k2] = v2
+				end
+			end
+			table.insert(subbiomes, sdef)
+			def[k] = nil -- remove
+		end
+		-- build a biome map based on water temperature
+		if k == "_ocean" and sdef._mcl_water_temp then
+			local temp = sdef._mcl_water_temp
+			if not vl_biomes.by_water_temp[temp] then vl_biomes.by_water_temp[temp] = {} end
+			table.insert(vl_biomes.by_water_temp[temp], sdef.name)
+		end
+	end
+	minetest.register_biome(def)
+	-- minetest.log("action", "registering biome "..tostring(def.name))
+	for _, sdef in ipairs(subbiomes) do
+		-- minetest.log("action", "registering subbiome "..tostring(sdef.name))
+		minetest.register_biome(sdef)
+	end
+end
+
+-- helper for spruce decorations
+function vl_biomes.register_spruce_decoration(seed, offset, sprucename, biomes, y_min)
+	local mod_mcl_core = minetest.get_modpath("mcl_core")
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"group:grass_block", "mcl_core:dirt", "mcl_core:podzol"},
+		sidelen = 16,
+		noise_params = {
+			offset = offset,
+			scale = 0.0006,
+			spread = vector.new(250, 250, 250),
+			seed = seed,
+			octaves = 3,
+			persist = 0.66
+		},
+		biomes = biomes,
+		y_min = y_min or 1,
+		y_max = vl_biomes.overworld_max,
+		schematic = mod_mcl_core .. "/schematics/" .. sprucename,
+		flags = "place_center_x, place_center_z",
+	})
+end
+
+--
+-- Detect mapgen to select functions
+--
+if mg_name == "singlenode" then
+	-- nothing in singlenode
+elseif superflat then
+	-- Implementation of Minecraft's Superflat mapgen, classic style:
+	-- * Perfectly flat land, 1 grass biome, no decorations, no caves
+	-- * 4 layers, from top to bottom: grass block, dirt, dirt, bedrock
+	minetest.clear_registered_biomes()
+	minetest.clear_registered_decorations()
+	minetest.clear_registered_schematics()
+	-- Classic Superflat: bedrock (not part of biome), 2 dirt, 1 grass block
+	minetest.register_biome({
+		name = "flat",
+		node_top = "mcl_core:dirt_with_grass",
+		depth_top = 1,
+		node_filler = "mcl_core:dirt",
+		depth_filler = 3,
+		node_stone = "mcl_core:dirt",
+		y_min = mcl_vars.mg_overworld_min - 512,
+		y_max = mcl_vars.mg_overworld_max,
+		humidity_point = 50,
+		heat_point = 50,
+		_mcl_biome_type = "medium",
+		_mcl_grass_palette_index = 0,
+		_mcl_foliage_palette_index = 1,
+		_mcl_water_palette_index = 0,
+		_mcl_watertemp = "ocean",
+		_mcl_waterfogcolor = waterfogcolor["ocean"],
+		_mcl_skycolor = "#78A7FF",
+		_mcl_fogcolor = vl_biomes.overworld_fogcolor
+	})
+elseif mg_name ~= "v6" then
+	-- OVERWORLD biomes
+	--[[ These biomes try to resemble MC. This means especially the floor cover and the type of
+	plants and structures (shapes might differ). The terrain itself will be of course different and
+	depends on the mapgen.
+	Important: MC also takes the terrain into account while MT biomes so far don't care about the
+	terrain at all (except height).
+	MC has many “M” and “Hills” variants, most of which only differ in terrain compared to their original
+	counterpart.
+	In MT, any biome can occour in any terrain, so these variants are implied and are therefore
+	not explicitly implmented in MCL2. “M” variants are only included if they have another unique feature,
+	such as a different land cover.
+	In MCL2, the MC Overworld biomes are split in multiple more parts (stacked by height):
+	* The main part, this represents the land. It begins at around sea level and usually goes all the way up
+	* _ocean: For the area covered by ocean water. The y_max may vary for various beach effects.
+	          Has sand or dirt as floor.
+	* _deep_ocean: Like _ocean, but deeper and has gravel as floor
+	* _underground:
+	* Other modifiers: Some complex biomes require more layers to improve the landscape.
+
+	The following naming conventions apply:
+	* The land biome name is equal to the MC biome name, as of Minecraft 1.11 (in camel case)
+	* Height modifiers and sub-biomes are appended with underscores and in lowercase. Example: “_ocean”
+	* Non-MC biomes are written in lowercase
+	* MC dimension biomes are named after their MC dimension
+
+	Intentionally missing biomes:
+	* River (generated by valleys and v7)
+	* Frozen River (generated by valleys and v7)
+	* Hills biomes (shape only)
+	* Plateau (shape only)
+	* Plateau M (shape only)
+	* Cold Taiga M (mountain only)
+	* Taiga M (mountain only)
+	* Roofed Forest M (mountain only)
+	* Swampland M (mountain only)
+	* Extreme Hills Edge (unused in MC)
+
+	TODO:
+	* Better beaches
+	* Improve Extreme Hills M
+	* Desert M (desert lakes - removed?)
+	]]
+
+	dofile(modpath.."/plains.lua")
+	dofile(modpath.."/plains_sunflower.lua")
+	dofile(modpath.."/savanna.lua")
+	dofile(modpath.."/savanna_windswept.lua")
+	dofile(modpath.."/desert.lua")
+	-- missing: Meadow, similar to Plains?
+
+	dofile(modpath.."/forest.lua")
+	dofile(modpath.."/forest_flower.lua")
+	dofile(modpath.."/birchforest.lua")
+	dofile(modpath.."/birchforest_old.lua")
+	dofile(modpath.."/taiga.lua")
+	dofile(modpath.."/taiga_old_pine.lua")
+	dofile(modpath.."/taiga_old_spruce.lua")
+	dofile(modpath.."/dark_forest.lua")
+	-- missing: Cherry Grove
+
+	-- missing: Frozen Peaks -- just a matter of shape?
+	-- missing: Grove, but how does it differ from snowy taiga?
+	-- missing: Jagged Peaks -- just a matter of shape?
+	dofile(modpath.."/snowy_taiga.lua")
+	dofile(modpath.."/snowy_plains.lua")
+	dofile(modpath.."/snowy_plains_spikes.lua")
+	-- missing: Snowy Slopes -- just a matter of shape?
+
+	dofile(modpath.."/badlands.lua")
+	dofile(modpath.."/badlands_eroded.lua")
+	dofile(modpath.."/badlands_wooded.lua")
+	dofile(modpath.."/badlands_wooded_mod.lua")
+	dofile(modpath.."/badlands-strata.lua") -- not a biome, but shared code that needs to be last
+
+	dofile(modpath.."/jungle.lua")
+	dofile(modpath.."/jungle_edge.lua")
+	dofile(modpath.."/jungle_modified.lua")
+	dofile(modpath.."/jungle_modified_edge.lua")
+
+	dofile(modpath.."/bamboojungle.lua")
+	dofile(modpath.."/bamboojungle_edge.lua")
+	dofile(modpath.."/bamboojungle_modified.lua")
+	dofile(modpath.."/bamboojungle_modified_edge.lua")
+
+	dofile(modpath.."/swampland.lua")
+	dofile(modpath.."/mangroveswamp.lua")
+	dofile(modpath.."/mushroomisland.lua")
+
+	dofile(modpath.."/stonebeach.lua")
+	dofile(modpath.."/windswepthills.lua")
+	dofile(modpath.."/windswepthills_forest.lua")
+	dofile(modpath.."/windswepthills_gravelly.lua")
+	-- missing: Stony Peaks -- just a matter of shape?
+
+	-- missing: Deep Dark
+	-- missing: Dripstone Caves
+	-- missing: Lush Caves
+
+	-- Additional decorations
+	dofile(modpath.."/deco/bamboo.lua")
+	dofile(modpath.."/deco/cacti.lua")
+	dofile(modpath.."/deco/corals.lua")
+	dofile(modpath.."/deco/fern.lua")
+	dofile(modpath.."/deco/flowers.lua")
+	dofile(modpath.."/deco/mushrooms.lua")
+	dofile(modpath.."/deco/pumpkin.lua")
+	dofile(modpath.."/deco/reeds.lua")
+	dofile(modpath.."/deco/seagrass_kelp.lua")
+	dofile(modpath.."/deco/snowy_dirt.lua")
+	dofile(modpath.."/deco/sweet_berry.lua")
+	dofile(modpath.."/deco/tallgrass.lua")
+end
+-- FIXME: add back some v6 support?
+
+-- Non-overworld in everything except singlenode
+if mg_name ~= "singlenode" then
+	--[[ THE NETHER ]]
+	-- the following decoration is a hack to cover exposed bedrock in netherrack - be careful
+	-- not to put any ceiling decorations in a way that would apply to this
+	-- (they would get generated regardless of biome)
+	mcl_mapgen_core.register_decoration({
+		deco_type = "simple",
+		place_on = {"mcl_core:bedrock"},
+		sidelen = 16,
+		fill_ratio = 10,
+		y_min = vl_biomes.lava_nether_max,
+		y_max = vl_biomes.nether_max + 15,
+		height = 6,
+		max_height = 10,
+		decoration = "mcl_nether:netherrack",
+		flags = "all_ceilings",
+		param2 = 0,
+	})
+	mcl_mapgen_core.register_decoration({
+		deco_type = "simple",
+		place_on = {"mcl_core:bedrock"},
+		sidelen = 16,
+		fill_ratio = 10,
+		y_min = vl_biomes.nether_min - 10,
+		y_max = vl_biomes.lava_nether_max,
+		height = 7,
+		max_height = 14,
+		decoration = "mcl_nether:netherrack",
+		flags = "all_floors,force_placement",
+		param2 = 0,
+	})
+
+	-- Nether biomes
+	dofile(modpath.."/nether/netherwastes.lua")
+	dofile(modpath.."/nether/soulsandvalley.lua")
+	dofile(modpath.."/nether/crimsonforest.lua")
+	dofile(modpath.."/nether/warpedforest.lua")
+	dofile(modpath.."/nether/basaltdelta.lua")
+	-- Sahred ores across nether biomes
+	dofile(modpath.."/nether/ores.lua")
+
+	--[[ THE END ]]
+	dofile(modpath.."/end/end.lua")
+end
+

mods/MAPGEN/vl_biomes/jungle.lua

@@ -0,0 +1,173 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Jungle
+vl_biomes.register_biome({
+	name = "Jungle",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 88,
+	heat_point = 81,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 24,
+	_mcl_foliage_palette_index = 12,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#77A8FF",
+	_shore = {
+		node_top = "mcl_core:dirt",
+		depth_top = 1,
+		y_min = -2,
+		y_max = 0,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		y_max = -3,
+		vertical_blend = 1,
+	},
+})
+
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.004,
+	biomes = {"Jungle"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Huge jungle tree (4 variants)
+for i = 1, 4 do
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+		sidelen = 80,
+		fill_ratio = 0.0008,
+		biomes = {"Jungle"},
+		y_min = 4,
+		y_max = vl_biomes.overworld_max,
+		schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree_huge_"..i..".mts",
+		flags = "place_center_x, place_center_z",
+		rotation = "random",
+	})
+end
+
+-- Common jungle tree
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.025,
+	biomes = {"Jungle"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.015,
+	biomes = {"Jungle"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree_2.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.005,
+	biomes = {"Jungle"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree_3.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.005,
+	biomes = {"Jungle"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree_4.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+-- Jungle bush
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.0196,
+		scale = 0.015,
+		spread = vector.new(250, 250, 250),
+		seed = 2930,
+		octaves = 4,
+		persist = 0.6,
+	},
+	biomes = {"Jungle"},
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_bush_oak_leaves.mts",
+	flags = "place_center_x, place_center_z",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.0196,
+		scale = 0.005,
+		spread = vector.new(250, 250, 250),
+		seed = 2930,
+		octaves = 4,
+		persist = 0.6,
+	},
+	biomes = {"Jungle" },
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_bush_oak_leaves_2.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+-- Melon
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.01,
+		scale = 0.006,
+		spread = vector.new(250, 250, 250),
+		seed = 333,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_farming:melon",
+	biomes = {"Jungle"},
+})
+

mods/MAPGEN/vl_biomes/jungle_edge.lua

@@ -0,0 +1,93 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Jungle Edge aka Sparse Jungle
+vl_biomes.register_biome({
+	name = "JungleEdge",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 2,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 88,
+	heat_point = 76,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 26,
+	_mcl_foliage_palette_index = 13,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#77A8FF",
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 2,
+	},
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.0004,
+	biomes = {"JungleEdge"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.0045,
+	biomes = {"JungleEdge"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.0085,
+		scale = 0.025,
+		spread = vector.new(250, 250, 250),
+		seed = 2930,
+		octaves = 4,
+		persist = 0.6,
+	},
+	biomes = {"JungleEdge"},
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_bush_oak_leaves.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+-- Melon
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.005,
+		scale = 0.006,
+		spread = vector.new(250, 250, 250),
+		seed = 333,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_farming:melon",
+	biomes = {"JungleEdge"},
+})
+

mods/MAPGEN/vl_biomes/jungle_modified.lua

@@ -0,0 +1,115 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Jungle M aka modified Jungle
+-- Like Jungle but with even more dense vegetation
+vl_biomes.register_biome({
+	name = "JungleM",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 92,
+	heat_point = 81,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 25,
+	_mcl_foliage_palette_index = 12,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#77A8FF",
+	_shore = {
+		node_top = "mcl_core:dirt",
+		depth_top = 1,
+		y_min = -2,
+		y_max = 0,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		y_max = -3,
+		vertical_blend = 1,
+	},
+})
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.004,
+	biomes = {"JungleM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Huge jungle tree (4 variants)
+for i = 1, 4 do
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+		sidelen = 80,
+		fill_ratio = 0.003,
+		biomes = {"JungleM"},
+		y_min = 4,
+		y_max = vl_biomes.overworld_max,
+		schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree_huge_"..i..".mts",
+		flags = "place_center_x, place_center_z",
+		rotation = "random",
+	})
+end
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.09,
+	biomes = {"JungleM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree_2.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.05,
+		scale = 0.025,
+		spread = vector.new(250, 250, 250),
+		seed = 2930,
+		octaves = 4,
+		persist = 0.6,
+	},
+	biomes = {"JungleM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_bush_oak_leaves.mts",
+	flags = "place_center_x, place_center_z",
+})
+-- Melon
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.0,
+		scale = 0.006,
+		spread = vector.new(250, 250, 250),
+		seed = 333,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_farming:melon",
+	biomes = {"JungleM"},
+})

mods/MAPGEN/vl_biomes/jungle_modified_edge.lua

@@ -0,0 +1,113 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Jungle Edge M (very rare).
+-- Almost identical to Jungle Edge. Has deeper dirt. Melons spawn here a lot.
+-- This biome occours directly between Jungle M and Jungle Edge but also has a small border to Jungle.
+-- This biome is very small in general.
+vl_biomes.register_biome({
+	name = "JungleEdgeM",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 4,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 90,
+	heat_point = 79,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 27,
+	_mcl_foliage_palette_index = 13,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#77A8FF",
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 4,
+	},
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.0004,
+	biomes = {"JungleEdgeM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.0045,
+	biomes = {"JungleEdgeM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_tree.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.0085,
+		scale = 0.025,
+		spread = vector.new(250, 250, 250),
+		seed = 2930,
+		octaves = 4,
+		persist = 0.6,
+	},
+	biomes = {"JungleEdgeM"},
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_jungle_bush_oak_leaves.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+-- Lots of melons in Jungle Edge M
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.013,
+		scale = 0.006,
+		spread = vector.new(125, 125, 125),
+		seed = 333,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_farming:melon",
+	biomes = {"JungleEdgeM"},
+})
+
+-- Melon
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"group:grass_block_no_snow"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.005,
+		scale = 0.006,
+		spread = vector.new(250, 250, 250),
+		seed = 333,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_farming:melon",
+	biomes = {"JungleEdgeM"},
+})

mods/MAPGEN/vl_biomes/mangroveswamp.lua

@@ -0,0 +1,207 @@
+-- TODO: move to mcl_mangrove module?
+local mod_mcl_mangrove = minetest.get_modpath("mcl_mangrove")
+local mg_seed = minetest.get_mapgen_setting("seed")
+
+-- Mangrove swamp
+vl_biomes.register_biome({
+	name = "MangroveSwamp",
+	node_top = "mcl_mud:mud",
+	depth_top = 1,
+	node_filler = "mcl_mud:mud",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:dirt",
+	depth_riverbed = 2,
+	y_min = -5, -- was 1, with _shore below
+	y_max = 27, -- Note: Limited in height!
+	humidity_point = 95,
+	heat_point = 94,
+	_mcl_biome_type = "hot",
+	_mcl_water_temp = "warm",
+	_mcl_grass_palette_index = 27,
+	_mcl_foliage_palette_index = 6,
+	_mcl_water_palette_index = 7,
+	_mcl_waterfogcolor = "#3A7A6A",
+	_mcl_skycolor = "#78A7FF",
+	-- removed, as it did not differ _shore = { y_min = -5, y_max = 0, },
+	_ocean = {
+		node_top = "mcl_core:dirt",
+		depth_top = 1,
+		node_filler = "mcl_core:dirt",
+		depth_filler = 3,
+		node_riverbed = "mcl_core:gravel",
+		depth_riverbed = 2,
+		y_max = -6,
+		vertical_blend = 1,
+	},
+})
+
+--- Grow mangrove roots after generation
+local function mangrove_root_gennotify(t, minp, maxp, blockseed)
+	for _, pos in ipairs(t) do
+		local nn = minetest.find_nodes_in_area(vector.offset(pos, -8, -1, -8), vector.offset(pos, 8, 0, 8), {"mcl_mangrove:mangrove_roots"})
+		if nn and #nn > 0 then
+			local pr = PcgRandom(blockseed + mg_seed + 38327)
+			for _, v in pairs(nn) do
+				local l = pr:next(2, 16)
+				local n = minetest.get_node(vector.offset(v, 0, -1, 0)).name
+				if minetest.get_item_group(n, "water") > 0 then
+					local wl = "mcl_mangrove:water_logged_roots"
+					if n:find("river") then wl = "mcl_mangrove:river_water_logged_roots" end
+					minetest.bulk_swap_node(minetest.find_nodes_in_area(v, vector.offset(v, 0, -l, 0), {"group:water"}), {name = wl})
+				elseif n == "mcl_mud:mud" then
+					minetest.bulk_swap_node(minetest.find_nodes_in_area(v, vector.offset(v, 0, -l, 0), {"mcl_mud:mud"}), {name = "mcl_mangrove:mangrove_mud_roots"})
+				elseif n == "air" then
+					minetest.bulk_swap_node(minetest.find_nodes_in_area(v, vector.offset(v, 0, -l, 0), {"air"}), {name = "mcl_mangrove:mangrove_roots"})
+				end
+			end
+		end
+	end
+end
+
+mcl_mapgen_core.register_decoration({
+	name = "mcl_biomes:mangrove_tree_1",
+	deco_type = "schematic",
+	place_on = {"mcl_mud:mud"},
+	sidelen = 80,
+	fill_ratio = 0.0065,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mangrove .. "/schematics/mcl_mangrove_tree_1.mts",
+	flags = "place_center_x, place_center_z, force_placement",
+	rotation = "random",
+	gen_callback = mangrove_root_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	name = "mcl_biomes:mangrove_tree_2",
+	deco_type = "schematic",
+	place_on = {"mcl_mud:mud"},
+	sidelen = 80,
+	fill_ratio = 0.0045,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	y_min = -1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mangrove .. "/schematics/mcl_mangrove_tree_2.mts",
+	flags = "place_center_x, place_center_z, force_placement",
+	rotation = "random",
+	gen_callback = mangrove_root_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	name = "mcl_biomes:mangrove_tree_3",
+	deco_type = "schematic",
+	place_on = {"mcl_mud:mud"},
+	sidelen = 80,
+	fill_ratio = 0.023,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	y_min = -1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mangrove .. "/schematics/mcl_mangrove_tree_3.mts",
+	flags = "place_center_x, place_center_z, force_placement",
+	rotation = "random",
+	gen_callback = mangrove_root_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	name = "mcl_biomes:mangrove_tree_4",
+	deco_type = "schematic",
+	place_on = {"mcl_mud:mud"},
+	sidelen = 80,
+	fill_ratio = 0.023,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	y_min = -1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mangrove .. "/schematics/mcl_mangrove_tree_4.mts",
+	flags = "place_center_x, place_center_z, force_placement",
+	rotation = "random",
+	gen_callback = mangrove_root_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	name = "mcl_biomes:mangrove_tree_5",
+	deco_type = "schematic",
+	place_on = {"mcl_mud:mud"},
+	sidelen = 80,
+	fill_ratio = 0.023,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	y_min = -1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mangrove .. "/schematics/mcl_mangrove_tree_5.mts",
+	flags = "place_center_x, place_center_z, force_placement",
+	rotation = "random",
+	gen_callback = mangrove_root_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	name = "mcl_biomes:mangrove_bee_nest",
+	deco_type = "schematic",
+	place_on = {"mcl_mud:mud"},
+	sidelen = 80,
+	--[[noise_params = {
+		offset = 0.01,
+		scale = 0.00001,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.33
+	},]]--
+	fill_ratio = 0.0005,
+	biomes = {"MangroveSwamp"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mangrove .. "/schematics/mcl_mangrove_bee_nest.mts",
+	flags = "place_center_x, place_center_z, force_placement",
+	rotation = "random",
+	spawn_by = "group:flower",
+	priority = 1550,
+	gen_callback = mangrove_root_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_mud:mud"},
+	sidelen = 80,
+	fill_ratio = 0.045,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	y_min = 0,
+	y_max = 0,
+	decoration = "mcl_mangrove:water_logged_roots",
+	flags = "place_center_x, place_center_z, force_placement",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_mangrove:mangrove_roots"},
+	spawn_by = {"group:water"},
+	num_spawn_by = 2,
+	sidelen = 80,
+	fill_ratio = 10,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	y_min = 0,
+	y_max = 0,
+	decoration = "mcl_mangrove:water_logged_roots",
+	flags = "place_center_x, place_center_z, force_placement, all_ceilings",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_mud:mud"},
+	sidelen = 80,
+	fill_ratio = 0.045,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	place_offset_y = -1,
+	decoration = "mcl_mangrove:mangrove_mud_roots",
+	flags = "place_center_x, place_center_z, force_placement",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_mud:mud"},
+	sidelen = 80,
+	fill_ratio = 0.008,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	decoration = "mcl_core:deadbush",
+	flags = "place_center_x, place_center_z",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:water_source"},
+	sidelen = 80,
+	fill_ratio = 0.035,
+	biomes = {"MangroveSwamp", "MangroveSwamp_shore"},
+	decoration = "mcl_flowers:waterlily",
+	flags = "place_center_x, place_center_z, liquid_surface",
+})

mods/MAPGEN/vl_biomes/mod.conf

@@ -1,4 +1,4 @@
-name = mcl_biomes
-author = maikerumine
+name = vl_biomes
+author = maikerumine,wuzzy,kno10
 description = Adds the various biomes and biome-related things for non-v6 map generators.
 depends = mcl_init, mcl_mapgen_core, mcl_core, mcl_worlds, mcl_farming, mcl_flowers, mcl_end, mcl_ocean, mcl_crimson, mcl_blackstone, mcl_mangrove

mods/MAPGEN/vl_biomes/mushroomisland.lua

@@ -0,0 +1,107 @@
+local mod_mcl_mushrooms = minetest.get_modpath("mcl_mushrooms")
+-- Mushroom Island / Mushroom Island Shore (rare) aka Mushroom Fields
+-- Not neccessarily an island at all, only named after Minecraft's biome
+vl_biomes.register_biome({
+	name = "MushroomIsland",
+	node_top = "mcl_core:mycelium",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1, -- was 4, with Shore below
+	y_max = 20, -- Note: Limited in height!
+	vertical_blend = 1,
+	humidity_point = 106,
+	heat_point = 50,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "ocean",
+	_mcl_grass_palette_index = 29,
+	_mcl_foliage_palette_index = 17,
+	_mcl_water_palette_index = 0,
+	_mcl_skycolor = "#77A8FF",
+	-- _shore = { name = "MushroomIslandShore", y_min = 1, y_max = 3, },
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 3,
+	},
+})
+
+local ratio_mushroom_mycelium = 0.002
+local ratio_mushroom_mycelium_huge = ratio_mushroom_mycelium * (11 / 12)
+local ratio_mushroom_mycelium_giant = ratio_mushroom_mycelium * (1 / 12)
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:mycelium"},
+	sidelen = 80,
+	fill_ratio = ratio_mushroom_mycelium_huge,
+	biomes = {"MushroomIsland"}, --"MushroomIslandShore"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mushrooms .. "/schematics/mcl_mushrooms_huge_brown.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "0",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:mycelium"},
+	sidelen = 80,
+	fill_ratio = ratio_mushroom_mycelium_giant,
+	biomes = {"MushroomIsland"}, --"MushroomIslandShore"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mushrooms .. "/schematics/mcl_mushrooms_giant_brown.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "0",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:mycelium"},
+	sidelen = 80,
+	fill_ratio = ratio_mushroom_mycelium_huge,
+	biomes = {"MushroomIsland"}, --"MushroomIslandShore"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mushrooms .. "/schematics/mcl_mushrooms_huge_red.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "0",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:mycelium"},
+	sidelen = 80,
+	fill_ratio = ratio_mushroom_mycelium_giant,
+	biomes = {"MushroomIsland"}, --"MushroomIslandShore"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_mushrooms .. "/schematics/mcl_mushrooms_giant_red.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "0",
+})
+
+-- Mushrooms in mushroom biome
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:mycelium"},
+	sidelen = 80,
+	fill_ratio = 0.009,
+	biomes = {"MushroomIsland", "MushroomIslandShore"},
+	noise_threshold = 2.0,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_red",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:mycelium"},
+	sidelen = 80,
+	fill_ratio = 0.009,
+	biomes = {"MushroomIsland", "MushroomIslandShore"},
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_brown",
+})

mods/MAPGEN/vl_biomes/nether/basaltdelta.lua

@@ -0,0 +1,135 @@
+-- Nether Basalt Delta biome
+vl_biomes.register_biome({
+	name = "BasaltDelta",
+	node_filler = "mcl_nether:netherrack",
+	node_stone = "mcl_nether:netherrack",
+	node_top = "mcl_blackstone:basalt",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.nether_min,
+	y_max = vl_biomes.nether_max + 80,
+	heat_point = 27,
+	humidity_point = 80,
+	_mcl_biome_type = "hot",
+	_mcl_grass_palette_index = 17,
+	_mcl_foliage_palette_index = 3,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.nether_skycolor,
+	_mcl_fogcolor = "#685F70"
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_nether:netherrack", "mcl_nether:glowstone", "mcl_blackstone:nether_gold", "mcl_nether:quartz_ore", "mcl_core:gravel", "mcl_nether:soul_sand", "mcl_blackstone:blackstone", "mcl_nether:magma"},
+	sidelen = 16,
+	fill_ratio = 10,
+	biomes = {"BasaltDelta"},
+	y_min = vl_biomes.lava_nether_max,
+	y_max = vl_biomes.nether_deco_max,
+	decoration = "mcl_blackstone:basalt",
+	flags = "all_floors",
+	param2 = 0,
+})
+
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "mcl_blackstone:blackstone",
+	wherein = {"mcl_nether:netherrack", "mcl_nether:glowstone", "mcl_core:gravel"},
+	clust_scarcity = 100,
+	clust_num_ores = 400,
+	clust_size = 20,
+	biomes = {"BasaltDelta"},
+	y_min = vl_biomes.lava_nether_max,
+	y_max = vl_biomes.nether_deco_max,
+	noise_params = {
+		offset = 0,
+		scale = 1,
+		spread = vector.new(250, 250, 250),
+		seed = 12345,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		flags = "defaults",
+	}
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	decoration = "mcl_blackstone:basalt",
+	place_on = {"mcl_blackstone:basalt", "mcl_nether:netherrack", "mcl_blackstone:blackstone"},
+	sidelen = 80,
+	height_max = 55,
+	noise_params = {
+		offset = -0.0085,
+		scale = 0.002,
+		spread = vector.new(25, 120, 25),
+		seed = 2325,
+		octaves = 5,
+		persist = 2,
+		lacunarity = 3.5,
+		flags = "absvalue"
+	},
+	biomes = {"BasaltDelta"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_deco_max - 50,
+	flags = "all_floors, all ceilings",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	decoration = "mcl_blackstone:basalt",
+	place_on = {"mcl_blackstone:basalt", "mcl_nether:netherrack", "mcl_blackstone:blackstone"},
+	sidelen = 80,
+	height_max = 15,
+	noise_params = {
+		offset = -0.0085,
+		scale = 0.004,
+		spread = vector.new(25, 120, 25),
+		seed = 235,
+		octaves = 5,
+		persist = 2.5,
+		lacunarity = 3.5,
+		flags = "absvalue"
+	},
+	biomes = {"BasaltDelta"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_deco_max - 15,
+	flags = "all_floors, all ceilings",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	decoration = "mcl_blackstone:basalt",
+	place_on = {"mcl_blackstone:basalt", "mcl_nether:netherrack", "mcl_blackstone:blackstone"},
+	sidelen = 80,
+	height_max = 3,
+	fill_ratio = 0.4,
+	biomes = {"BasaltDelta"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_deco_max - 15,
+	flags = "all_floors, all ceilings",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	decoration = "mcl_nether:magma",
+	place_on = {"mcl_blackstone:basalt", "mcl_nether:netherrack", "mcl_blackstone:blackstone"},
+	sidelen = 80,
+	fill_ratio = 0.082323,
+	biomes = {"BasaltDelta"},
+	place_offset_y = -1,
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors, all ceilings",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	decoration = "mcl_nether:nether_lava_source",
+	place_on = {"mcl_blackstone:basalt", "mcl_nether:netherrack", "mcl_blackstone:blackstone"},
+	spawn_by = {"mcl_blackstone:basalt", "mcl_blackstone:blackstone"},
+	num_spawn_by = 14,
+	sidelen = 80,
+	fill_ratio = 4,
+	biomes = {"BasaltDelta"},
+	place_offset_y = -1,
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 5,
+	flags = "all_floors, force_placement",
+})

mods/MAPGEN/vl_biomes/nether/crimsonforest.lua

@@ -0,0 +1,121 @@
+local mod_mcl_crimson = minetest.get_modpath("mcl_crimson")
+
+vl_biomes.register_biome({
+	name = "CrimsonForest",
+	node_filler = "mcl_nether:netherrack",
+	node_stone = "mcl_nether:netherrack",
+	node_top = "mcl_crimson:crimson_nylium",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.nether_min,
+	y_max = vl_biomes.nether_max + 80,
+	heat_point = 60,
+	humidity_point = 47,
+	_mcl_biome_type = "hot",
+	_mcl_grass_palette_index = 17,
+	_mcl_foliage_palette_index = 3,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.nether_skycolor,
+	_mcl_fogcolor = "#330303"
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_nether:netherrack", "mcl_nether:glowstone", "mcl_blackstone:nether_gold", "mcl_nether:quartz_ore", "mcl_core:gravel", "mcl_nether:soul_sand", "mcl_nether:magma", "mcl_blackstone:blackstone"},
+	sidelen = 16,
+	fill_ratio = 10,
+	biomes = {"CrimsonForest"},
+	y_min = vl_biomes.lava_nether_max,
+	y_max = vl_biomes.nether_deco_max,
+	decoration = "mcl_crimson:crimson_nylium",
+	flags = "all_floors",
+	param2 = 0,
+})
+--- Fix light for mushroom lights after generation
+local function fix_light_8_gennotify(t, minp, maxp, blockseed)
+	for _, pos in ipairs(t) do
+		minetest.fix_light(vector.offset(pos, -8, -8, -8), vector.offset(pos, 8, 8, 8))
+	end
+end
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_crimson:crimson_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.02,
+	biomes = {"CrimsonForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 10,
+	flags = "all_floors",
+	decoration = "mcl_crimson:crimson_fungus",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	name = "mcl_biomes:crimson_tree1",
+	place_on = {"mcl_crimson:crimson_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.008,
+	biomes = {"CrimsonForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 10,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_crimson .. "/schematics/crimson_fungus_1.mts",
+	size = vector.new(5, 8, 5),
+	rotation = "random",
+	gen_callback = fix_light_8_gennotify,
+})
+minetest.register_alias("mcl_biomes:crimson_tree", "mcl_biomes:crimson_tree1") -- legacy inconsistency, fixed 08/2024
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	name = "mcl_biomes:crimson_tree2",
+	place_on = {"mcl_crimson:crimson_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.006,
+	biomes = {"CrimsonForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 15,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_crimson .. "/schematics/crimson_fungus_2.mts",
+	size = vector.new(5, 12, 5),
+	rotation = "random",
+	gen_callback = fix_light_8_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	name = "mcl_biomes:crimson_tree3",
+	place_on = {"mcl_crimson:crimson_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.004,
+	biomes = {"CrimsonForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 20,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_crimson .. "/schematics/crimson_fungus_3.mts",
+	size = vector.new(7, 13, 7),
+	rotation = "random",
+	gen_callback = fix_light_8_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_crimson:warped_nylium", "mcl_crimson:weeping_vines", "mcl_nether:netherrack"},
+	sidelen = 16,
+	fill_ratio = 0.063,
+	biomes = {"CrimsonForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_deco_max,
+	flags = "all_ceilings",
+	height = 2,
+	height_max = 8,
+	decoration = "mcl_crimson:weeping_vines",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_crimson:crimson_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.082,
+	biomes = {"CrimsonForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors",
+	max_height = 5,
+	decoration = "mcl_crimson:crimson_roots",
+})

mods/MAPGEN/vl_biomes/nether/netherwastes.lua

@@ -0,0 +1,102 @@
+-- Nether Wastes
+minetest.register_biome({
+	name = "Nether",
+	node_filler = "mcl_nether:netherrack",
+	node_stone = "mcl_nether:netherrack",
+	node_top = "mcl_nether:netherrack",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.nether_min,
+	y_max = vl_biomes.nether_max + 80,
+	heat_point = 100,
+	humidity_point = 0,
+	_mcl_biome_type = "hot",
+	_mcl_grass_palette_index = 17,
+	_mcl_foliage_palette_index = 3,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.nether_skycolor,
+	_mcl_fogcolor = "#330808"
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_nether:netherrack", "mcl_nether:glowstone", "mcl_blackstone:nether_gold", "mcl_nether:quartz_ore", "mcl_core:gravel", "mcl_nether:soul_sand", "mcl_nether:glowstone", "mcl_nether:magma"},
+	sidelen = 16,
+	fill_ratio = 10,
+	biomes = {"Nether"},
+	y_min = vl_biomes.lava_nether_max,
+	y_max = vl_biomes.nether_deco_max,
+	decoration = "mcl_nether:netherrack",
+	flags = "all_floors",
+	param2 = 0,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_nether:netherrack", "mcl_nether:magma"},
+	sidelen = 16,
+	fill_ratio = 0.04,
+	biomes = {"Nether"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 1,
+	flags = "all_floors",
+	decoration = "mcl_fire:eternal_fire",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_nether:netherrack"},
+	sidelen = 16,
+	fill_ratio = 0.013,
+	biomes = {"Nether"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 1,
+	flags = "all_floors",
+	decoration = "mcl_mushrooms:mushroom_brown",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_nether:netherrack"},
+	sidelen = 16,
+	fill_ratio = 0.012,
+	biomes = {"Nether"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 1,
+	flags = "all_floors",
+	decoration = "mcl_mushrooms:mushroom_red",
+})
+
+--nether gold
+local mg_name = minetest.get_mapgen_setting("mg_name")
+if mg_name ~= "v6" then
+	minetest.register_ore({
+		ore_type = "scatter",
+		ore = "mcl_blackstone:blackstone_gilded",
+		wherein = "mcl_blackstone:blackstone",
+		clust_scarcity = 4775,
+		clust_num_ores = 2,
+		clust_size = 2,
+		y_min = vl_biomes.nether_min,
+		y_max = vl_biomes.nether_max,
+	})
+	minetest.register_ore({
+		ore_type = "scatter",
+		ore = "mcl_blackstone:nether_gold",
+		wherein = "mcl_nether:netherrack",
+		clust_scarcity = 830,
+		clust_num_ores = 5,
+		clust_size = 3,
+		y_min = vl_biomes.nether_min,
+		y_max = vl_biomes.nether_max,
+	})
+	minetest.register_ore({
+		ore_type = "scatter",
+		ore = "mcl_blackstone:nether_gold",
+		wherein = "mcl_nether:netherrack",
+		clust_scarcity = 1660,
+		clust_num_ores = 4,
+		clust_size = 2,
+		y_min = vl_biomes.nether_min,
+		y_max = vl_biomes.nether_max,
+	})
+end

mods/MAPGEN/vl_biomes/nether/ores.lua

@@ -0,0 +1,190 @@
+-- Soul sand
+minetest.register_ore({
+	ore_type = "sheet",
+	ore = "mcl_nether:soul_sand",
+	-- Note: Stone is included only for v6 mapgen support. Netherrack is not generated naturally
+	-- in v6, but instead set with the on_generated function in mcl_mapgen_core.
+	wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+	clust_scarcity = 13 * 13 * 13,
+	clust_size = 5,
+	y_min = vl_biomes.nether_min,
+	y_max = mcl_worlds.layer_to_y(64, "nether"),
+	noise_threshold = 0.0,
+	noise_params = {
+		offset = 0.5,
+		scale = 0.1,
+		spread = vector.new(5, 5, 5),
+		seed = 2316,
+		octaves = 1,
+		persist = 0.0
+	},
+})
+
+-- Magma blocks
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "mcl_nether:magma",
+	wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+	clust_scarcity = 8 * 8 * 8,
+	clust_num_ores = 45,
+	clust_size = 6,
+	y_min = mcl_worlds.layer_to_y(23, "nether"),
+	y_max = mcl_worlds.layer_to_y(37, "nether"),
+	noise_params = {
+		offset = 0,
+		scale = 1,
+		spread = vector.new(250, 250, 250),
+		seed = 12345,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		flags = "defaults",
+	},
+})
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "mcl_nether:magma",
+	wherein = {"mcl_nether:netherrack"},
+	clust_scarcity = 10 * 10 * 10,
+	clust_num_ores = 65,
+	clust_size = 8,
+	y_min = mcl_worlds.layer_to_y(23, "nether"),
+	y_max = mcl_worlds.layer_to_y(37, "nether"),
+	noise_params = {
+		offset = 0,
+		scale = 1,
+		spread = vector.new(250, 250, 250),
+		seed = 12345,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		flags = "defaults",
+	},
+})
+
+-- Glowstone
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "mcl_nether:glowstone",
+	wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+	clust_scarcity = 26 * 26 * 26,
+	clust_size = 5,
+	y_min = vl_biomes.lava_nether_max + 10,
+	y_max = vl_biomes.nether_max - 13,
+	noise_threshold = 0.0,
+	noise_params = {
+		offset = 0.5,
+		scale = 0.1,
+		spread = vector.new(5, 5, 5),
+		seed = 17676,
+		octaves = 1,
+		persist = 0.0
+	},
+})
+
+-- Gravel (Nether)
+minetest.register_ore({
+	ore_type = "sheet",
+	ore = "mcl_core:gravel",
+	wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+	column_height_min = 1,
+	column_height_max = 1,
+	column_midpoint_factor = 0,
+	y_min = mcl_worlds.layer_to_y(63, "nether"),
+	-- This should be 65, but for some reason with this setting, the sheet ore really stops at 65. o_O
+	y_max = mcl_worlds.layer_to_y(65 + 2, "nether"),
+	noise_threshold = 0.2,
+	noise_params = {
+		offset = 0.0,
+		scale = 0.5,
+		spread = vector.new(20, 20, 20),
+		seed = 766,
+		octaves = 3,
+		persist = 0.6,
+	},
+})
+
+-- Nether quartz
+if minetest.settings:get_bool("mcl_generate_ores", true) then
+	minetest.register_ore({
+		ore_type = "scatter",
+		ore = "mcl_nether:quartz_ore",
+		wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+		clust_scarcity = 850,
+		clust_num_ores = 4, -- MC cluster amount: 4-10
+		clust_size = 3,
+		y_min = vl_biomes.nether_min,
+		y_max = vl_biomes.nether_max,
+	})
+	minetest.register_ore({
+		ore_type = "scatter",
+		ore = "mcl_nether:quartz_ore",
+		wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+		clust_scarcity = 1650,
+		clust_num_ores = 8, -- MC cluster amount: 4-10
+		clust_size = 4,
+		y_min = vl_biomes.nether_min,
+		y_max = vl_biomes.nether_max,
+	})
+end
+
+-- Lava springs in the Nether
+minetest.register_ore({
+	ore_type = "scatter",
+	ore = "mcl_nether:nether_lava_source",
+	wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+	clust_scarcity = 13500, --rare
+	clust_num_ores = 1,
+	clust_size = 1,
+	y_min = vl_biomes.lava_nether_max,
+	y_max = vl_biomes.nether_max - 13,
+})
+
+local lava_biomes = {"BasaltDelta", "Nether"}
+minetest.register_ore({
+	ore_type = "scatter",
+	ore = "mcl_nether:nether_lava_source",
+	wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+	clust_scarcity = 500,
+	clust_num_ores = 1,
+	clust_size = 1,
+	biomes = lava_biomes,
+	y_min = vl_biomes.nether_min,
+	y_max = vl_biomes.lava_nether_max + 1,
+})
+
+minetest.register_ore({
+	ore_type = "scatter",
+	ore = "mcl_nether:nether_lava_source",
+	wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+	clust_scarcity = 1000,
+	clust_num_ores = 1,
+	clust_size = 1,
+	biomes = lava_biomes,
+	y_min = vl_biomes.lava_nether_max + 2,
+	y_max = vl_biomes.lava_nether_max + 12,
+})
+
+minetest.register_ore({
+	ore_type = "scatter",
+	ore = "mcl_nether:nether_lava_source",
+	wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+	clust_scarcity = 2000,
+	clust_num_ores = 1,
+	clust_size = 1,
+	biomes = lava_biomes,
+	y_min = vl_biomes.lava_nether_max + 13,
+	y_max = vl_biomes.lava_nether_max + 48,
+})
+minetest.register_ore({
+	ore_type = "scatter",
+	ore = "mcl_nether:nether_lava_source",
+	wherein = {"mcl_nether:netherrack", "mcl_core:stone"},
+	clust_scarcity = 3500,
+	clust_num_ores = 1,
+	clust_size = 1,
+	biomes = lava_biomes,
+	y_min = vl_biomes.lava_nether_max + 49,
+	y_max = vl_biomes.nether_max - 13,
+})
+

mods/MAPGEN/vl_biomes/nether/soulsandvalley.lua

@@ -0,0 +1,115 @@
+local mod_mcl_blackstone = minetest.get_modpath("mcl_blackstone")
+
+vl_biomes.register_biome({
+	name = "SoulsandValley",
+	node_filler = "mcl_nether:netherrack",
+	node_stone = "mcl_nether:netherrack",
+	node_top = "mcl_blackstone:soul_soil",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.nether_min,
+	y_max = vl_biomes.nether_max + 80,
+	heat_point = 77,
+	humidity_point = 33,
+	_mcl_biome_type = "hot",
+	_mcl_grass_palette_index = 17,
+	_mcl_foliage_palette_index = 3,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.nether_skycolor,
+	_mcl_fogcolor = "#1B4745"
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_nether:netherrack", "mcl_nether:glowstone", "mcl_nether:magma"},
+	sidelen = 16,
+	fill_ratio = 10,
+	biomes = {"SoulsandValley"},
+	y_min = vl_biomes.lava_nether_max,
+	y_max = vl_biomes.nether_deco_max,
+	decoration = "mcl_blackstone:soul_soil",
+	flags = "all_floors, all_ceilings",
+	param2 = 0,
+})
+minetest.register_ore({
+	ore_type = "blob",
+	ore = "mcl_nether:soul_sand",
+	wherein = {"mcl_nether:netherrack", "mcl_blackstone:soul_soil"},
+	clust_scarcity = 100,
+	clust_num_ores = 225,
+	clust_size = 15,
+	biomes = {"SoulsandValley"},
+	y_min = vl_biomes.lava_nether_max,
+	y_max = vl_biomes.nether_deco_max,
+	noise_params = {
+		offset = 0,
+		scale = 1,
+		spread = vector.new(250, 250, 250),
+		seed = 12345,
+		octaves = 3,
+		persist = 0.6,
+		lacunarity = 2,
+		flags = "defaults",
+	}
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_blackstone:soul_soil", "mcl_nether:soul_sand"},
+	sidelen = 16,
+	fill_ratio = 0.062,
+	biomes = {"SoulsandValley"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors",
+	max_height = 5,
+	decoration = "mcl_blackstone:soul_fire",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_blackstone:soul_soil", "mcl_nether:soulsand"},
+	sidelen = 16,
+	fill_ratio = 0.000212,
+	biomes = {"SoulsandValley"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_blackstone .. "/schematics/mcl_blackstone_nether_fossil_1.mts",
+	size = vector.new(5, 8, 5),
+	rotation = "random",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_blackstone:soul_soil", "mcl_nether:soulsand"},
+	sidelen = 16,
+	fill_ratio = 0.0002233,
+	biomes = {"SoulsandValley"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_blackstone .. "/schematics/mcl_blackstone_nether_fossil_2.mts",
+	size = vector.new(5, 8, 5),
+	rotation = "random",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_blackstone:soul_soil", "mcl_nether:soulsand"},
+	sidelen = 16,
+	fill_ratio = 0.000225,
+	biomes = {"SoulsandValley"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_blackstone .. "/schematics/mcl_blackstone_nether_fossil_3.mts",
+	size = vector.new(5, 8, 5),
+	rotation = "random",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_blackstone:soul_soil", "mcl_nether:soulsand"},
+	sidelen = 16,
+	fill_ratio = 0.00022323,
+	biomes = {"SoulsandValley"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_blackstone .. "/schematics/mcl_blackstone_nether_fossil_4.mts",
+	size = vector.new(5, 8, 5),
+	rotation = "random",
+})

mods/MAPGEN/vl_biomes/nether/warpedforest.lua

@@ -0,0 +1,129 @@
+local mod_mcl_crimson = minetest.get_modpath("mcl_crimson")
+
+vl_biomes.register_biome({
+	name = "WarpedForest",
+	node_filler = "mcl_nether:netherrack",
+	node_stone = "mcl_nether:netherrack",
+	node_top = "mcl_crimson:warped_nylium",
+	node_water = "air",
+	node_river_water = "air",
+	node_cave_liquid = "air",
+	y_min = vl_biomes.nether_min,
+	y_max = vl_biomes.nether_max + 80,
+	heat_point = 37,
+	humidity_point = 70,
+	_mcl_biome_type = "hot",
+	_mcl_grass_palette_index = 17,
+	_mcl_foliage_palette_index = 3,
+	_mcl_water_palette_index = 0,
+	_mcl_waterfogcolor = vl_biomes.default_waterfogcolor,
+	_mcl_skycolor = vl_biomes.nether_skycolor,
+	_mcl_fogcolor = "#1A051A"
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_nether:netherrack", "mcl_nether:glowstone", "mcl_blackstone:nether_gold", "mcl_nether:quartz_ore", "mcl_core:gravel", "mcl_nether:soul_sand", "mcl_nether:magma", "mcl_blackstone:blackstone"},
+	sidelen = 16,
+	fill_ratio = 10,
+	biomes = {"WarpedForest"},
+	y_min = vl_biomes.lava_nether_max,
+	y_max = vl_biomes.nether_deco_max,
+	decoration = "mcl_crimson:warped_nylium",
+	flags = "all_floors",
+	param2 = 0,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_crimson:warped_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.02,
+	biomes = {"WarpedForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 10,
+	flags = "all_floors",
+	decoration = "mcl_crimson:warped_fungus",
+})
+--- Fix light for mushroom lights after generation
+local function fix_light_8_gennotify(t, minp, maxp, blockseed)
+	for _, pos in ipairs(t) do
+		minetest.fix_light(vector.offset(pos, -8, -8, -8), vector.offset(pos, 8, 8, 8))
+	end
+end
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	name = "mcl_biomes:warped_tree1",
+	place_on = {"mcl_crimson:warped_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.007,
+	biomes = {"WarpedForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 15,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_crimson .. "/schematics/warped_fungus_1.mts",
+	size = vector.new(5, 11, 5),
+	rotation = "random",
+	gen_callback = fix_light_8_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	name = "mcl_biomes:warped_tree2",
+	place_on = {"mcl_crimson:warped_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.005,
+	biomes = {"WarpedForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 10,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_crimson .. "/schematics/warped_fungus_2.mts",
+	size = vector.new(5, 6, 5),
+	rotation = "random",
+	gen_callback = fix_light_8_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	name = "mcl_biomes:warped_tree3",
+	place_on = {"mcl_crimson:warped_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.003,
+	biomes = {"WarpedForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	y_max = vl_biomes.nether_max - 14,
+	flags = "all_floors, place_center_x, place_center_z",
+	schematic = mod_mcl_crimson .. "/schematics/warped_fungus_3.mts",
+	size = vector.new(5, 12, 5),
+	rotation = "random",
+	gen_callback = fix_light_8_gennotify,
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_crimson:warped_nylium", "mcl_crimson:twisting_vines"},
+	sidelen = 16,
+	fill_ratio = 0.032,
+	biomes = {"WarpedForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors",
+	height = 2,
+	height_max = 8,
+	decoration = "mcl_crimson:twisting_vines",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_crimson:warped_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.0812,
+	biomes = {"WarpedForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors",
+	max_height = 5,
+	decoration = "mcl_crimson:warped_roots",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_crimson:crimson_nylium"},
+	sidelen = 16,
+	fill_ratio = 0.052,
+	biomes = {"WarpedForest"},
+	y_min = vl_biomes.lava_nether_max + 1,
+	flags = "all_floors",
+	decoration = "mcl_crimson:nether_sprouts",
+})

mods/MAPGEN/vl_biomes/plains.lua

@@ -0,0 +1,36 @@
+-- Plains
+vl_biomes.register_biome({
+	name = "Plains",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 2,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 39,
+	heat_point = 58,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "ocean",
+	_mcl_grass_palette_index = 0,
+	_mcl_foliage_palette_index = 1,
+	_mcl_water_palette_index = 0,
+	_mcl_skycolor = "#78A7FF",
+	_beach = {
+		node_top = "mcl_core:sand",
+		depth_top = 2,
+		node_filler = "mcl_core:sandstone",
+		depth_filler = 2,
+		y_min = 0,
+		y_max = 2,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		y_max = -1,
+	},
+})
+

mods/MAPGEN/vl_biomes/plains_sunflower.lua

@@ -0,0 +1,29 @@
+-- Sunflower Plains
+vl_biomes.register_biome({
+	name = "SunflowerPlains",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 28,
+	heat_point = 45,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "ocean",
+	_mcl_grass_palette_index = 11,
+	_mcl_foliage_palette_index = 1,
+	_mcl_water_palette_index = 0,
+	_mcl_skycolor = "#78A7FF",
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		node_riverbed = "mcl_core:dirt",
+		depth_riverbed = 2,
+	},
+})
+

mods/MAPGEN/vl_biomes/savanna.lua

@@ -0,0 +1,65 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+-- Savanna
+vl_biomes.register_biome({
+	name = "Savanna",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 2,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 36,
+	heat_point = 79,
+	_mcl_biome_type = "hot",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 1,
+	_mcl_foliage_palette_index = 3,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#6EB1FF",
+	_beach = {
+		node_top = "mcl_core:sand",
+		depth_top = 3,
+		node_filler = "mcl_core:sandstone",
+		depth_filler = 2,
+		y_min = -1,
+		y_max = 0,
+		_mcl_foliage_palette_index = 1,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		y_max = -2,
+	},
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	fill_ratio = 0.0004,
+	biomes = {"JungleEdge", "JungleEdgeM", "Savanna"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+-- Acacia (many variants)
+for a = 1, 7 do
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt", "mcl_core:coarse_dirt"},
+		sidelen = 16,
+		fill_ratio = 0.0002,
+		biomes = {"Savanna"},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		schematic = mod_mcl_core .. "/schematics/mcl_core_acacia_" .. a .. ".mts",
+		flags = "place_center_x, place_center_z",
+		rotation = "random",
+	})
+end
+

mods/MAPGEN/vl_biomes/savanna_windswept.lua

@@ -0,0 +1,45 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+-- Savanna M aka Shattered Savanna aka Windswept Savanna
+-- Changes to Savanna: Coarse Dirt. No sand beach. No oaks.
+-- Otherwise identical to Savanna
+vl_biomes.register_biome({
+	name = "SavannaM",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:coarse_dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 48,
+	heat_point = 100,
+	_mcl_biome_type = "hot",
+	_mcl_water_temp = "lukewarm",
+	_mcl_grass_palette_index = 23,
+	_mcl_foliage_palette_index = 3,
+	_mcl_water_palette_index = 2,
+	_mcl_skycolor = "#6EB1FF",
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+	},
+})
+-- Acacia (many variants)
+for a = 1, 7 do
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt", "mcl_core:coarse_dirt"},
+		sidelen = 16,
+		fill_ratio = 0.0002,
+		biomes = {"SavannaM"},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		schematic = mod_mcl_core .. "/schematics/mcl_core_acacia_" .. a .. ".mts",
+		flags = "place_center_x, place_center_z",
+		rotation = "random",
+	})
+end
+

mods/MAPGEN/vl_biomes/snowy_plains.lua

@@ -0,0 +1,101 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Ice Plains, aka ice flats, aka Snowy Plains
+vl_biomes.register_biome({
+	name = "IcePlains",
+	node_dust = "mcl_core:snow",
+	node_top = "mcl_core:dirt_with_grass_snow",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 2,
+	node_water_top = "mcl_core:ice",
+	depth_water_top = 2,
+	node_river_water = "mcl_core:ice",
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 24,
+	heat_point = 8,
+	_mcl_biome_type = "snowy",
+	_mcl_water_temp = "frozen",
+	_mcl_grass_palette_index = 10,
+	_mcl_foliage_palette_index = 2,
+	_mcl_water_palette_index = 5,
+	_mcl_skycolor = "#7FA1FF",
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 3,
+		_mcl_skycolor = "#7FA1FF", -- not default, but icy
+	},
+})
+
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block", "mcl_core:dirt", },
+	sidelen = 16,
+	noise_params = {
+		offset = 0.0,
+		scale = 0.0002,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.7
+	},
+	biomes = {"IcePlains"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Rare spruce in Ice Plains
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.00075,
+		scale = -0.0015,
+		spread = vector.new(250, 250, 250),
+		seed = 11,
+		octaves = 3,
+		persist = 0.7
+	},
+	biomes = {"IcePlains"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_spruce_5.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+-- Place tall grass on snow in Ice Plains
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	priority = 1500,
+	place_on = {"group:grass_block"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.08,
+		scale = 0.09,
+		spread = vector.new(15, 15, 15),
+		seed = 420,
+		octaves = 3,
+		persist = 0.6,
+	},
+	biomes = {"IcePlains"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = {
+		size = vector.new(1, 2, 1),
+		data = {
+			{name = "mcl_core:dirt_with_grass", force_place = true, },
+			{name = "mcl_flowers:tallgrass", param2 = 10},
+		},
+	},
+})
+

mods/MAPGEN/vl_biomes/snowy_plains_spikes.lua

@@ -0,0 +1,75 @@
+local mod_mcl_structures = minetest.get_modpath("mcl_structures")
+
+-- Ice Plains Spikes (rare) aka Ice Spikes
+vl_biomes.register_biome({
+	name = "IcePlainsSpikes",
+	node_top = "mcl_core:snowblock",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 2,
+	node_water_top = "mcl_core:ice",
+	depth_water_top = 1,
+	node_river_water = "mcl_core:ice",
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 24,
+	heat_point = -5,
+	_mcl_biome_type = "snowy",
+	_mcl_water_temp = "frozen",
+	_mcl_grass_palette_index = 2,
+	_mcl_foliage_palette_index = 2,
+	_mcl_water_palette_index = 5,
+	_mcl_skycolor = "#7FA1FF",
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 3,
+		_mcl_skycolor = "#7FA1FF", -- not default, but icy
+	},
+})
+
+-- FIXME: on slopes, they tend to float on one side. Use even larger spikes and a negative y_offset?
+-- Large ice spike
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:snowblock", "mcl_core:snow", "group:grass_block_snow"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.00040,
+		scale = 0.001,
+		spread = vector.new(250, 250, 250),
+		seed = 1133,
+		octaves = 4,
+		persist = 0.67,
+	},
+	biomes = {"IcePlainsSpikes"},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_structures .. "/schematics/mcl_structures_ice_spike_large.mts",
+	rotation = "random",
+	flags = "place_center_x, place_center_z",
+})
+
+-- Small ice spike
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:snowblock", "mcl_core:snow", "group:grass_block_snow"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.005,
+		scale = 0.001,
+		spread = vector.new(250, 250, 250),
+		seed = 1133,
+		octaves = 4,
+		persist = 0.67,
+	},
+	biomes = {"IcePlainsSpikes"},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_structures .. "/schematics/mcl_structures_ice_spike_small.mts",
+	rotation = "random",
+	flags = "place_center_x, place_center_z",
+})

mods/MAPGEN/vl_biomes/snowy_taiga.lua

@@ -0,0 +1,103 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Cold Taiga aka Snowy Taiga
+vl_biomes.register_biome({
+	name = "ColdTaiga",
+	node_dust = "mcl_core:snow",
+	node_top = "mcl_core:dirt_with_grass_snow",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 2,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 58,
+	heat_point = 8,
+	_mcl_biome_type = "snowy",
+	_mcl_water_temp = "frozen",
+	_mcl_grass_palette_index = 3,
+	_mcl_foliage_palette_index = 2,
+	_mcl_water_palette_index = 5,
+	_mcl_skycolor = "#839EFF",
+	-- A cold beach-like biome, implemented as low part of Cold Taiga
+	_beach = {
+		node_top = "mcl_core:sand",
+		depth_top = 2,
+		node_water_top = "mcl_core:ice",
+		depth_water_top = 1,
+		node_filler = "mcl_core:sandstone",
+		depth_filler = 2,
+		y_min = 1,
+		y_max = 2,
+		_mcl_foliage_palette_index = 16,
+		_mcl_skycolor = "#7FA1FF", -- not default, but icy
+	},
+	-- Water part of the beach. Added to prevent snow being on the ice.
+	_beach_water = {
+		node_top = "mcl_core:sand",
+		depth_top = 2,
+		node_water_top = "mcl_core:ice",
+		depth_water_top = 1,
+		node_filler = "mcl_core:sandstone",
+		depth_filler = 2,
+		y_min = -4,
+		y_max = 0,
+		_mcl_foliage_palette_index = 16,
+		_mcl_skycolor = "#7FA1FF", -- not default, but icy
+	},
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 3,
+		y_max = -5,
+		vertical_blend = 1,
+		_mcl_skycolor = "#7FA1FF", -- not default, but icy
+	},
+})
+-- Small lollipop spruce
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block", "mcl_core:podzol"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.004,
+		scale = 0.0022,
+		spread = vector.new(250, 250, 250),
+		seed = 2500,
+		octaves = 3,
+		persist = 0.66
+	},
+	biomes = {"ColdTaiga"},
+	y_min = 2,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_spruce_lollipop.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+-- Matchstick spruce: Very few leaves, tall trunk
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block", "mcl_core:podzol"},
+	sidelen = 80,
+	noise_params = {
+		offset = -0.025,
+		scale = 0.025,
+		spread = vector.new(250, 250, 250),
+		seed = 2566,
+		octaves = 5,
+		persist = 0.60,
+	},
+	biomes = {"ColdTaiga"},
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_spruce_matchstick.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+vl_biomes.register_spruce_decoration(11000, 0.00150, "mcl_core_spruce_5.mts", {"ColdTaiga"})
+
+vl_biomes.register_spruce_decoration(2500, 0.00325, "mcl_core_spruce_1.mts", {"ColdTaiga"})
+vl_biomes.register_spruce_decoration(7000, 0.00425, "mcl_core_spruce_3.mts", {"ColdTaiga"})
+vl_biomes.register_spruce_decoration(9000, 0.00325, "mcl_core_spruce_4.mts", {"ColdTaiga"})

mods/MAPGEN/vl_biomes/stonebeach.lua

@@ -0,0 +1,26 @@
+-- Stone beach, aka Stony Shore
+-- Just stone.
+-- Not neccessarily a beach at all, only named so according to MC
+vl_biomes.register_biome({
+	name = "StoneBeach",
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 1,
+	y_min = -7,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 0,
+	heat_point = 8,
+	_mcl_biome_type = "cold",
+	_mcl_water_temp = "cold",
+	_mcl_grass_palette_index = 9,
+	_mcl_foliage_palette_index = 11,
+	_mcl_water_palette_index = 4,
+	_mcl_skycolor = "#7DA2FF",
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		y_min = vl_biomes.OCEAN_MIN,
+		y_max = -8,
+		vertical_blend = 2,
+	},
+})
+

mods/MAPGEN/vl_biomes/swampland.lua

@@ -0,0 +1,96 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Swampland
+vl_biomes.register_biome({
+	name = "Swampland",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = 23, -- Note: Limited in height!
+	humidity_point = 90,
+	heat_point = 50,
+	_mcl_biome_type = "medium",
+	_mcl_water_temp = "ocean",
+	_mcl_grass_palette_index = 28,
+	_mcl_foliage_palette_index = 5,
+	_mcl_water_palette_index = 1,
+	_mcl_waterfogcolor = "#617B64",
+	_mcl_skycolor = "#78A7FF",
+	_shore = {
+		node_top = "mcl_core:dirt",
+		depth_top = 1,
+		y_min = -5,
+		y_max = 0,
+	},
+	_ocean = {
+		node_top = "mcl_core:sand",
+		depth_top = 1,
+		node_filler = "mcl_core:sand",
+		depth_filler = 3,
+		y_max = -6,
+		vertical_blend = 1,
+	},
+})
+-- Swamp oak
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block_no_snow", "mcl_core:dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.0055,
+		scale = 0.0011,
+		spread = vector.new(250, 250, 250),
+		seed = 5005,
+		octaves = 5,
+		persist = 0.6,
+	},
+	biomes = {"Swampland", "Swampland_shore"},
+	y_min = 0,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_swamp.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Lily pad
+local lily_schem = {
+	{name = "mcl_core:water_source"},
+	{name = "mcl_flowers:waterlily"},
+}
+
+-- Spawn them in shallow water at ocean level in Swampland.
+-- Tweak lilydepth to change the maximum water depth
+local lilydepth = 2
+
+for d = 1, lilydepth do
+	local height = d + 2
+	local y = 1 - d
+	table.insert(lily_schem, 1, {name = "air", prob = 0})
+
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		schematic = {
+			size = vector.new(1, height, 1),
+			data = lily_schem,
+		},
+		place_on = "mcl_core:dirt",
+		sidelen = 16,
+		noise_params = {
+			offset = 0,
+			scale = 0.3,
+			spread = vector.new(100, 100, 100),
+			seed = 503,
+			octaves = 6,
+			persist = 0.7,
+		},
+		y_min = y,
+		y_max = y,
+		biomes = {"Swampland_shore"},
+		rotation = "random",
+	})
+end
+

mods/MAPGEN/vl_biomes/taiga.lua

@@ -0,0 +1,106 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Taiga
+vl_biomes.register_biome({
+	name = "Taiga",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 58,
+	heat_point = 22,
+	_mcl_biome_type = "cold",
+	_mcl_water_temp = "cold",
+	_mcl_grass_palette_index = 12,
+	_mcl_foliage_palette_index = 10,
+	_mcl_water_palette_index = 4,
+	_mcl_skycolor = "#7DA3FF",
+	_beach = {
+		node_top = "mcl_core:sand",
+		depth_top = 2,
+		node_filler = "mcl_core:sandstone",
+		depth_filler = 1,
+		y_min = 1,
+		y_max = 3,
+		_mcl_foliage_palette_index = 1,
+	},
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 3,
+	},
+})
+
+-- Small lollipop spruce
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block", "mcl_core:podzol"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.004,
+		scale = 0.0022,
+		spread = vector.new(250, 250, 250),
+		seed = 2500,
+		octaves = 3,
+		persist = 0.66
+	},
+	biomes = {"Taiga"},
+	y_min = 2,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_spruce_lollipop.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+-- Matchstick spruce: Very few leaves, tall trunk
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block", "mcl_core:podzol"},
+	sidelen = 80,
+	noise_params = {
+		offset = -0.025,
+		scale = 0.025,
+		spread = vector.new(250, 250, 250),
+		seed = 2566,
+		octaves = 5,
+		persist = 0.60,
+	},
+	biomes = {"Taiga"},
+	y_min = 3,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_spruce_matchstick.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+-- Common spruce
+vl_biomes.register_spruce_decoration(11000, 0.00150, "mcl_core_spruce_5.mts", {"Taiga"})
+vl_biomes.register_spruce_decoration(2500, 0.00325, "mcl_core_spruce_1.mts", {"Taiga"})
+vl_biomes.register_spruce_decoration(7000, 0.00425, "mcl_core_spruce_3.mts", {"Taiga"})
+vl_biomes.register_spruce_decoration(9000, 0.00325, "mcl_core_spruce_4.mts", {"Taiga"})
+
+-- Mushrooms in Taiga
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:podzol"},
+	sidelen = 80,
+	fill_ratio = 0.003,
+	biomes = {"Taiga"},
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_red",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:podzol"},
+	sidelen = 80,
+	fill_ratio = 0.003,
+	biomes = {"Taiga"},
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_brown",
+})
+

mods/MAPGEN/vl_biomes/taiga_old_pine.lua

@@ -0,0 +1,138 @@
+local mod_mcl_structures = minetest.get_modpath("mcl_structures")
+
+-- Mega Pine Taiga aka Old Growth Pine Taiga
+vl_biomes.register_biome({
+	name = "MegaTaiga",
+	node_top = "mcl_core:podzol",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 76,
+	heat_point = 10,
+	_mcl_biome_type = "cold",
+	_mcl_water_temp = "cold",
+	_mcl_grass_palette_index = 4,
+	_mcl_foliage_palette_index = 9,
+	_mcl_water_palette_index = 4,
+	_mcl_skycolor = "#7CA3FF",
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 3,
+	},
+})
+
+-- Random coarse dirt floor in Mega Taiga
+minetest.register_ore({
+	ore_type = "sheet",
+	ore = "mcl_core:coarse_dirt",
+	wherein = {"mcl_core:podzol", "mcl_core:dirt"},
+	clust_scarcity = 1,
+	clust_num_ores = 12,
+	clust_size = 10,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_threshold = 0.2,
+	noise_params = {offset = 0, scale = 15, spread = vector.new(130, 130, 130), seed = 24, octaves = 3, persist = 0.70},
+	biomes = {"MegaTaiga"},
+})
+-- Mossy cobblestone boulder (3x3)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:podzol", "mcl_core:dirt", "mcl_core:coarse_dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.00015,
+		scale = 0.001,
+		spread = vector.new(300, 300, 300),
+		seed = 775703,
+		octaves = 4,
+		persist = 0.63,
+	},
+	biomes = {"MegaTaiga"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_structures .. "/schematics/mcl_structures_boulder.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Small mossy cobblestone boulder (2x2)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:podzol", "mcl_core:dirt", "mcl_core:coarse_dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.001,
+		scale = 0.001,
+		spread = vector.new(300, 300, 300),
+		seed = 775704,
+		octaves = 4,
+		persist = 0.63,
+	},
+	biomes = {"MegaTaiga"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_structures .. "/schematics/mcl_structures_boulder_small.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Huge spruce
+vl_biomes.register_spruce_decoration(3000, 0.0008, "mcl_core_spruce_huge_up_1.mts", {"MegaTaiga"})
+vl_biomes.register_spruce_decoration(4000, 0.0008, "mcl_core_spruce_huge_up_2.mts", {"MegaTaiga"})
+vl_biomes.register_spruce_decoration(6000, 0.0008, "mcl_core_spruce_huge_up_3.mts", {"MegaTaiga"})
+
+
+-- Common spruce
+vl_biomes.register_spruce_decoration(2500, 0.00325, "mcl_core_spruce_1.mts", {"MegaTaiga"})
+vl_biomes.register_spruce_decoration(7000, 0.00425, "mcl_core_spruce_3.mts", {"MegaTaiga"})
+vl_biomes.register_spruce_decoration(9000, 0.00325, "mcl_core_spruce_4.mts", {"MegaTaiga"})
+vl_biomes.register_spruce_decoration(9500, 0.00500, "mcl_core_spruce_tall.mts", {"MegaTaiga"})
+vl_biomes.register_spruce_decoration(5000, 0.00250, "mcl_core_spruce_2.mts", {"MegaTaiga"})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	priority = 1500,
+	place_on = {"mcl_core:podzol", "mcl_core:dirt", "mcl_core:dirt_with_grass", "mcl_core:coarse_dirt", "group:hardened_clay"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.01,
+		scale = 0.003,
+		spread = vector.new(100, 100, 100),
+		seed = 1972,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	biomes = {"MegaTaiga"},
+	decoration = "mcl_core:deadbush",
+	height = 1,
+})
+-- Mushrooms in Taiga
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:podzol"},
+	sidelen = 80,
+	fill_ratio = 0.003,
+	biomes = {"MegaTaiga"},
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_red",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:podzol"},
+	sidelen = 80,
+	fill_ratio = 0.003,
+	biomes = {"MegaTaiga"},
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_brown",
+})

mods/MAPGEN/vl_biomes/taiga_old_spruce.lua

@@ -0,0 +1,123 @@
+local mod_mcl_structures = minetest.get_modpath("mcl_structures")
+
+-- Mega Spruce Taiga aka Old Growth Spruce Taiga
+vl_biomes.register_biome({
+	name = "MegaSpruceTaiga",
+	node_top = "mcl_core:podzol",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 2,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 100,
+	heat_point = 8,
+	_mcl_biome_type = "cold",
+	_mcl_water_temp = "cold",
+	_mcl_grass_palette_index = 5,
+	_mcl_foliage_palette_index = 10,
+	_mcl_water_palette_index = 4,
+	_mcl_skycolor = "#7DA3FF",
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 3,
+	},
+})
+-- Mossy cobblestone boulder (3x3)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:podzol", "mcl_core:dirt", "mcl_core:coarse_dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.00015,
+		scale = 0.001,
+		spread = vector.new(300, 300, 300),
+		seed = 775703,
+		octaves = 4,
+		persist = 0.63,
+	},
+	biomes = {"MegaSpruceTaiga"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_structures .. "/schematics/mcl_structures_boulder.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Small mossy cobblestone boulder (2x2)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"mcl_core:podzol", "mcl_core:dirt", "mcl_core:coarse_dirt"},
+	sidelen = 80,
+	noise_params = {
+		offset = 0.001,
+		scale = 0.001,
+		spread = vector.new(300, 300, 300),
+		seed = 775704,
+		octaves = 4,
+		persist = 0.63,
+	},
+	biomes = {"MegaSpruceTaiga"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_structures .. "/schematics/mcl_structures_boulder_small.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Huge spruce
+vl_biomes.register_spruce_decoration(3000, 0.0030, "mcl_core_spruce_huge_1.mts", {"MegaSpruceTaiga"})
+vl_biomes.register_spruce_decoration(4000, 0.0036, "mcl_core_spruce_huge_2.mts", {"MegaSpruceTaiga"})
+vl_biomes.register_spruce_decoration(6000, 0.0036, "mcl_core_spruce_huge_3.mts", {"MegaSpruceTaiga"})
+vl_biomes.register_spruce_decoration(6600, 0.0036, "mcl_core_spruce_huge_4.mts", {"MegaSpruceTaiga"})
+
+-- Common spruce
+vl_biomes.register_spruce_decoration(2500, 0.00325, "mcl_core_spruce_1.mts", {"MegaSpruceTaiga"})
+vl_biomes.register_spruce_decoration(7000, 0.00425, "mcl_core_spruce_3.mts", {"MegaSpruceTaiga"})
+vl_biomes.register_spruce_decoration(5000, 0.00250, "mcl_core_spruce_2.mts", {"MegaSpruceTaiga"})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	priority = 1500,
+	place_on = {"mcl_core:podzol", "mcl_core:dirt", "mcl_core:dirt_with_grass", "mcl_core:coarse_dirt", "group:hardened_clay"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.01,
+		scale = 0.003,
+		spread = vector.new(100, 100, 100),
+		seed = 1972,
+		octaves = 3,
+		persist = 0.6
+	},
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	biomes = {"MegaSpruceTaiga"},
+	decoration = "mcl_core:deadbush",
+	height = 1,
+})
+
+-- Mushrooms in Taiga
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:podzol"},
+	sidelen = 80,
+	fill_ratio = 0.003,
+	biomes = {"MegaSpruceTaiga"},
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_red",
+})
+mcl_mapgen_core.register_decoration({
+	deco_type = "simple",
+	place_on = {"mcl_core:podzol"},
+	sidelen = 80,
+	fill_ratio = 0.003,
+	biomes = {"MegaSpruceTaiga"},
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	decoration = "mcl_mushrooms:mushroom_brown",
+})
+

mods/MAPGEN/vl_biomes/windswepthills-ores.lua

@@ -0,0 +1,41 @@
+local mg_name = minetest.get_mapgen_setting("mg_name")
+
+-- Note: this currently has to go after all the extremehills (windswept hills) biomes in order to be able to register.
+-- Alternatively, we could put a copy into each...
+local stonelike = {"mcl_core:stone", "mcl_core:diorite", "mcl_core:andesite", "mcl_core:granite"}
+
+-- Emeralds
+minetest.register_ore({
+	ore_type = "scatter",
+	ore = "mcl_core:stone_with_emerald",
+	wherein = stonelike,
+	clust_scarcity = 16384,
+	clust_num_ores = 1,
+	clust_size = 1,
+	y_min = mcl_worlds.layer_to_y(4),
+	y_max = mcl_worlds.layer_to_y(32),
+	biomes = {
+		"ExtremeHills", "ExtremeHills_beach", "ExtremeHills_ocean", "ExtremeHills_deep_ocean", "ExtremeHills_underground",
+		"ExtremeHills+", "ExtremeHills+_ocean", "ExtremeHills+_deep_ocean", "ExtremeHills+_underground",
+		"ExtremeHillsM", "ExtremeHillsM_ocean", "ExtremeHillsM_deep_ocean", "ExtremeHillsM_underground",
+	},
+})
+
+-- Rarely replace stone with stone monster eggs.
+-- In v6 this can happen anywhere, in other mapgens only in Extreme Hills.
+local monster_egg_scarcity = (mg_name == "v6" and 28 or 26)^3
+minetest.register_ore({
+	ore_type = "scatter",
+	ore = "mcl_monster_eggs:monster_egg_stone",
+	wherein = "mcl_core:stone",
+	clust_scarcity = monster_egg_scarcity,
+	clust_num_ores = 3,
+	clust_size = 2,
+	y_min = vl_biomes.overworld_min,
+	y_max = mcl_worlds.layer_to_y(61),
+	biomes = {
+		"ExtremeHills", "ExtremeHills_beach", "ExtremeHills_ocean", "ExtremeHills_deep_ocean", "ExtremeHills_underground",
+		"ExtremeHills+", "ExtremeHills+_ocean", "ExtremeHills+_deep_ocean", "ExtremeHills+_underground",
+		"ExtremeHillsM", "ExtremeHillsM_ocean", "ExtremeHillsM_deep_ocean", "ExtremeHillsM_underground",
+	},
+})

mods/MAPGEN/vl_biomes/windswepthills.lua

@@ -0,0 +1,89 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Extreme Hills aka Windswept Hills
+-- Sparsely populated grasslands with little tallgras and trees.
+vl_biomes.register_biome({
+	name = "ExtremeHills",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 4,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 4,
+	y_min = 4,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 10,
+	heat_point = 45,
+	_mcl_biome_type = "cold",
+	_mcl_water_temp = "cold",
+	_mcl_grass_palette_index = 6,
+	_mcl_foliage_palette_index = 11,
+	_mcl_water_palette_index = 4,
+	_mcl_skycolor = "#7DA2FF",
+	_beach = {
+		node_top = "mcl_core:sand",
+		depth_top = 2,
+		node_filler = "mcl_core:sandstone",
+		depth_filler = 3,
+		y_min = -4,
+		y_max = 3,
+		_mcl_foliage_palette_index = 1,
+	},
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 4,
+		y_max = -5,
+		vertical_blend = 1,
+	},
+})
+
+-- Large oaks
+for i = 1, 4 do
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"group:grass_block", "mcl_core:dirt", },
+		sidelen = 80,
+		noise_params = {
+			offset = -0.0007,
+			scale = 0.001,
+			spread = vector.new(250, 250, 250),
+			seed = 3,
+			octaves = 3,
+			persist = 0.6
+		},
+		biomes = {"ExtremeHills"},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		schematic = mod_mcl_core .. "/schematics/mcl_core_oak_large_" .. i .. ".mts",
+		flags = "place_center_x, place_center_z",
+		rotation = "random",
+	})
+end
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block", "mcl_core:dirt", },
+	sidelen = 16,
+	noise_params = {
+		offset = 0.0,
+		scale = 0.002,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.7
+	},
+	biomes = {"ExtremeHills"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Spruce
+vl_biomes.register_spruce_decoration(11000, 0.000025, "mcl_core_spruce_5.mts", {"ExtremeHills"})
+vl_biomes.register_spruce_decoration(2500, 0.00005, "mcl_core_spruce_1.mts", {"ExtremeHills"})
+vl_biomes.register_spruce_decoration(7000, 0.00005, "mcl_core_spruce_3.mts", {"ExtremeHills"})
+vl_biomes.register_spruce_decoration(9000, 0.00005, "mcl_core_spruce_4.mts", {"ExtremeHills"})

mods/MAPGEN/vl_biomes/windswepthills_forest.lua

@@ -0,0 +1,136 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Extreme Hills+ aka Windswept Forest
+-- This biome is near-identical to Extreme Hills on the surface but has snow-covered mountains with spruce/oak
+-- forests above a certain height.
+vl_biomes.register_biome({
+	name = "ExtremeHills+",
+	node_top = "mcl_core:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "mcl_core:dirt",
+	depth_filler = 4,
+	node_riverbed = "mcl_core:sand",
+	depth_riverbed = 4,
+	y_min = 1,
+	y_max = 41,
+	humidity_point = 24,
+	heat_point = 25,
+	vertical_blend = 6,
+	_mcl_biome_type = "cold",
+	_mcl_water_temp = "cold",
+	_mcl_grass_palette_index = 8,
+	_mcl_foliage_palette_index = 11,
+	_mcl_water_palette_index = 4,
+	_mcl_skycolor = "#7DA2FF",
+	_snowtop = {
+		node_dust = "mcl_core:snow",
+		node_top = "mcl_core:dirt_with_grass_snow",
+		depth_top = 1,
+		node_river_water = "mcl_core:ice",
+		y_min = 42,
+		y_max = vl_biomes.overworld_max,
+	},
+	_ocean = {
+		node_top = "mcl_core:gravel",
+		depth_top = 1,
+		node_filler = "mcl_core:gravel",
+		depth_filler = 4,
+	},
+})
+
+-- Large oaks
+for i = 1, 4 do
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"group:grass_block", "mcl_core:dirt", },
+		sidelen = 80,
+		noise_params = {
+			offset = -0.0007,
+			scale = 0.001,
+			spread = vector.new(250, 250, 250),
+			seed = 3,
+			octaves = 3,
+			persist = 0.6
+		},
+		biomes = {"ExtremeHills+", "ExtremeHills+_snowtop"},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		schematic = mod_mcl_core .. "/schematics/mcl_core_oak_large_" .. i .. ".mts",
+		flags = "place_center_x, place_center_z",
+		rotation = "random",
+	})
+end
+
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block", "mcl_core:dirt", },
+	sidelen = 16,
+	noise_params = {
+		offset = 0.0,
+		scale = 0.002,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.7
+	},
+	biomes = {"ExtremeHills+", "ExtremeHills+_snowtop"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block", "mcl_core:dirt"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.006,
+		scale = 0.002,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.7
+	},
+	biomes = {"ExtremeHills+", "ExtremeHills+_snowtop"},
+	y_min = 50,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Spruce
+vl_biomes.register_spruce_decoration(11000, 0.001, "mcl_core_spruce_5.mts", {"ExtremeHills+", "ExtremeHills+_snowtop"}, 50)
+vl_biomes.register_spruce_decoration(2500, 0.002, "mcl_core_spruce_1.mts", {"ExtremeHills+", "ExtremeHills+_snowtop"}, 50)
+vl_biomes.register_spruce_decoration(7000, 0.003, "mcl_core_spruce_3.mts", {"ExtremeHills+", "ExtremeHills+_snowtop"}, 50)
+vl_biomes.register_spruce_decoration(9000, 0.002, "mcl_core_spruce_4.mts", {"ExtremeHills+", "ExtremeHills+_snowtop"}, 50)
+
+-- Some tallgrass
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	priority = 1500,
+	place_on = {"group:grass_block"},
+	sidelen = 16,
+	noise_params = {
+		offset = 0.0,
+		scale = 0.09,
+		spread = vector.new(15, 15, 15),
+		seed = 420,
+		octaves = 3,
+		persist = 0.6,
+	},
+	biomes = {"ExtremeHills+_snowtop"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = {
+		size = vector.new(1, 2, 1),
+		data = {
+			{name = "mcl_core:dirt_with_grass", force_place = true, },
+			{name = "mcl_flowers:tallgrass", param2 = 8},
+		},
+	},
+})
+

mods/MAPGEN/vl_biomes/windswepthills_gravelly.lua

@@ -0,0 +1,93 @@
+local mod_mcl_core = minetest.get_modpath("mcl_core")
+
+-- Extreme Hills M aka Windswept Gravelly Hills
+-- Just gravel.
+vl_biomes.register_biome({
+	name = "ExtremeHillsM",
+	node_top = "mcl_core:gravel",
+	depth_top = 1,
+	node_filler = "mcl_core:gravel",
+	depth_filler = 3,
+	node_riverbed = "mcl_core:gravel",
+	depth_riverbed = 3,
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	humidity_point = 0,
+	heat_point = 25,
+	_mcl_biome_type = "cold",
+	_mcl_water_temp = "cold",
+	_mcl_grass_palette_index = 7,
+	_mcl_foliage_palette_index = 11,
+	_mcl_water_palette_index = 4,
+	_mcl_skycolor = "#7DA2FF",
+	_ocean = {
+		node_riverbed = "mcl_core:sand",
+		depth_riverbed = 3,
+	},
+})
+
+-- Small dirt patches in Extreme Hills M
+minetest.register_ore({
+	ore_type = "blob",
+	-- TODO: Should be grass block. But generating this as ore means gras blocks will spawn undeground. :-(
+	ore = "mcl_core:dirt",
+	wherein = {"mcl_core:gravel"},
+	clust_scarcity = 5000,
+	clust_num_ores = 12,
+	clust_size = 4,
+	y_min = vl_biomes.overworld_min,
+	y_max = vl_biomes.overworld_max,
+	noise_threshold = 0.2,
+	noise_params = {offset = 0, scale = 5, spread = vector.new(250, 250, 250), seed = 64, octaves = 3, persist = 0.60},
+	biomes = {"ExtremeHillsM"},
+})
+
+-- Large oaks
+for i = 1, 4 do
+	mcl_mapgen_core.register_decoration({
+		deco_type = "schematic",
+		place_on = {"group:grass_block", "mcl_core:dirt", },
+		sidelen = 80,
+		noise_params = {
+			offset = -0.0007,
+			scale = 0.001,
+			spread = vector.new(250, 250, 250),
+			seed = 3,
+			octaves = 3,
+			persist = 0.6
+		},
+		biomes = {"ExtremeHillsM"},
+		y_min = 1,
+		y_max = vl_biomes.overworld_max,
+		schematic = mod_mcl_core .. "/schematics/mcl_core_oak_large_" .. i .. ".mts",
+		flags = "place_center_x, place_center_z",
+		rotation = "random",
+	})
+end
+-- Small “classic” oak (many biomes)
+mcl_mapgen_core.register_decoration({
+	deco_type = "schematic",
+	place_on = {"group:grass_block", "mcl_core:dirt", },
+	sidelen = 16,
+	noise_params = {
+		offset = 0.0,
+		scale = 0.002,
+		spread = vector.new(250, 250, 250),
+		seed = 2,
+		octaves = 3,
+		persist = 0.7
+	},
+	biomes = {"ExtremeHillsM"},
+	y_min = 1,
+	y_max = vl_biomes.overworld_max,
+	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
+	flags = "place_center_x, place_center_z",
+	rotation = "random",
+})
+
+-- Spruce
+vl_biomes.register_spruce_decoration(11000, 0.000025, "mcl_core_spruce_5.mts", {"ExtremeHillsM"})
+vl_biomes.register_spruce_decoration(2500, 0.00005, "mcl_core_spruce_1.mts", {"ExtremeHillsM"})
+vl_biomes.register_spruce_decoration(7000, 0.00005, "mcl_core_spruce_3.mts", {"ExtremeHillsM"})
+vl_biomes.register_spruce_decoration(9000, 0.00005, "mcl_core_spruce_4.mts", {"ExtremeHillsM"})
+