From 3cd36f57666f10af6f1991a78b723c045d7577ff Mon Sep 17 00:00:00 2001
From: thunderdog1138 <thunderdog1138@noreply.git.minetest.land>
Date: Mon, 21 Sep 2020 18:52:36 +0000
Subject: [PATCH] Delete 'mods/default/mapgen.lua'

---
 mods/default/mapgen.lua | 2247 ---------------------------------------
 1 file changed, 2247 deletions(-)
 delete mode 100644 mods/default/mapgen.lua

diff --git a/mods/default/mapgen.lua b/mods/default/mapgen.lua
deleted file mode 100644
index 868908d7..00000000
--- a/mods/default/mapgen.lua
+++ /dev/null
@@ -1,2247 +0,0 @@
---
--- Register ores
---
-
--- Mgv6
-
-function default.register_mgv6_ores()
-
-	-- Blob ore
-	-- These first to avoid other ores in blobs
-
-	-- Clay
-	-- This first to avoid clay in sand blobs
-
-	minetest.register_ore({
-		ore_type        = "blob",
-		ore             = "default:clay",
-		wherein         = {"default:sand"},
-		clust_scarcity  = 16 * 16 * 16,
-		clust_size      = 5,
-		y_max           = 0,
-		y_min           = -15,
-		noise_threshold = 0.0,
-		noise_params    = {
-			offset = 0.5,
-			scale = 0.2,
-			spread = {x = 5, y = 5, z = 5},
-			seed = -316,
-			octaves = 1,
-			persist = 0.0
-		},
-	})
-
-	-- Sand
-
-	minetest.register_ore({
-		ore_type        = "blob",
-		ore             = "default:sand",
-		wherein         = {"default:stone", "default:desert_stone"},
-		clust_scarcity  = 16 * 16 * 16,
-		clust_size      = 5,
-		y_max           = 0,
-		y_min           = -31,
-		noise_threshold = 0.0,
-		noise_params    = {
-			offset = 0.5,
-			scale = 0.2,
-			spread = {x = 5, y = 5, z = 5},
-			seed = 2316,
-			octaves = 1,
-			persist = 0.0
-		},
-	})
-
-	-- Dirt
-
-	minetest.register_ore({
-		ore_type        = "blob",
-		ore             = "default:dirt",
-		wherein         = {"default:stone"},
-		clust_scarcity  = 16 * 16 * 16,
-		clust_size      = 5,
-		y_max           = 31000,
-		y_min           = -31,
-		noise_threshold = 0.0,
-		noise_params    = {
-			offset = 0.5,
-			scale = 0.2,
-			spread = {x = 5, y = 5, z = 5},
-			seed = 17676,
-			octaves = 1,
-			persist = 0.0
-		},
-	})
-
-	-- Gravel
-
-	minetest.register_ore({
-		ore_type        = "blob",
-		ore             = "default:gravel",
-		wherein         = {"default:stone"},
-		clust_scarcity  = 16 * 16 * 16,
-		clust_size      = 5,
-		y_max           = 31000,
-		y_min           = -31000,
-		noise_threshold = 0.0,
-		noise_params    = {
-			offset = 0.5,
-			scale = 0.2,
-			spread = {x = 5, y = 5, z = 5},
-			seed = 766,
-			octaves = 1,
-			persist = 0.0
-		},
-	})
-
-	-- Scatter ores
-
-	-- Coal
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_coal",
-		wherein        = "default:stone",
-		clust_scarcity = 8 * 8 * 8,
-		clust_num_ores = 9,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_coal",
-		wherein        = "default:stone",
-		clust_scarcity = 8 * 8 * 8,
-		clust_num_ores = 8,
-		clust_size     = 3,
-		y_max          = 64,
-		y_min          = -31000,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_coal",
-		wherein        = "default:stone",
-		clust_scarcity = 24 * 24 * 24,
-		clust_num_ores = 27,
-		clust_size     = 6,
-		y_max          = 0,
-		y_min          = -31000,
-	})
-
-	-- Iron
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_zersium",
-		wherein        = "default:stone",
-		clust_scarcity = 9 * 9 * 9,
-		clust_num_ores = 12,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_zersium",
-		wherein        = "default:stone",
-		clust_scarcity = 7 * 7 * 7,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = 0,
-		y_min          = -31000,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_zersium",
-		wherein        = "default:stone",
-		clust_scarcity = 24 * 24 * 24,
-		clust_num_ores = 27,
-		clust_size     = 6,
-		y_max          = -64,
-		y_min          = -31000,
-	})
-
-	-- Copper
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_copper",
-		wherein        = "default:stone",
-		clust_scarcity = 9 * 9 * 9,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_copper",
-		wherein        = "default:stone",
-		clust_scarcity = 12 * 12 * 12,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = -16,
-		y_min          = -63,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_copper",
-		wherein        = "default:stone",
-		clust_scarcity = 9 * 9 * 9,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = -64,
-		y_min          = -31000,
-	})
-
-	-- Tin
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_tin",
-		wherein        = "default:stone",
-		clust_scarcity = 10 * 10 * 10,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_tin",
-		wherein        = "default:stone",
-		clust_scarcity = 13 * 13 * 13,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = -32,
-		y_min          = -127,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_tin",
-		wherein        = "default:stone",
-		clust_scarcity = 10 * 10 * 10,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = -128,
-		y_min          = -31000,
-	})
-
-	-- Gold
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_gold",
-		wherein        = "default:stone",
-		clust_scarcity = 13 * 13 * 13,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_gold",
-		wherein        = "default:stone",
-		clust_scarcity = 15 * 15 * 15,
-		clust_num_ores = 3,
-		clust_size     = 2,
-		y_max          = -64,
-		y_min          = -255,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_gold",
-		wherein        = "default:stone",
-		clust_scarcity = 13 * 13 * 13,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = -256,
-		y_min          = -31000,
-	})
-
-
-	-- Diamond
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_beskar",
-		wherein        = "default:stone",
-		clust_scarcity = 15 * 15 * 15,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_beskar",
-		wherein        = "default:stone",
-		clust_scarcity = 17 * 17 * 17,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = -128,
-		y_min          = -255,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_beskar",
-		wherein        = "default:stone",
-		clust_scarcity = 15 * 15 * 15,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = -256,
-		y_min          = -31000,
-	})
-end
-
-
--- All mapgens except mgv6
-
-function default.register_ores()
-
-	-- Stratum ores.
-	-- These obviously first.
-
-	-- Silver sandstone
-
-	minetest.register_ore({
-		ore_type        = "stratum",
-		ore             = "default:silver_sandstone",
-		wherein         = {"default:stone"},
-		clust_scarcity  = 1,
-		y_max           = 46,
-		y_min           = 10,
-		noise_params    = {
-			offset = 28,
-			scale = 16,
-			spread = {x = 128, y = 128, z = 128},
-			seed = 90122,
-			octaves = 1,
-		},
-		stratum_thickness = 4,
-		biomes = {"cold_desert"},
-	})
-
-	minetest.register_ore({
-		ore_type        = "stratum",
-		ore             = "default:silver_sandstone",
-		wherein         = {"default:stone"},
-		clust_scarcity  = 1,
-		y_max           = 42,
-		y_min           = 6,
-		noise_params    = {
-			offset = 24,
-			scale = 16,
-			spread = {x = 128, y = 128, z = 128},
-			seed = 90122,
-			octaves = 1,
-		},
-		stratum_thickness = 2,
-		biomes = {"cold_desert"},
-	})
-
-	-- Desert sandstone
-
-	minetest.register_ore({
-		ore_type        = "stratum",
-		ore             = "default:desert_sandstone",
-		wherein         = {"default:desert_stone"},
-		clust_scarcity  = 1,
-		y_max           = 46,
-		y_min           = 10,
-		noise_params    = {
-			offset = 28,
-			scale = 16,
-			spread = {x = 128, y = 128, z = 128},
-			seed = 90122,
-			octaves = 1,
-		},
-		stratum_thickness = 4,
-		biomes = {"desert"},
-	})
-
-	minetest.register_ore({
-		ore_type        = "stratum",
-		ore             = "default:desert_sandstone",
-		wherein         = {"default:desert_stone"},
-		clust_scarcity  = 1,
-		y_max           = 42,
-		y_min           = 6,
-		noise_params    = {
-			offset = 24,
-			scale = 16,
-			spread = {x = 128, y = 128, z = 128},
-			seed = 90122,
-			octaves = 1,
-		},
-		stratum_thickness = 2,
-		biomes = {"desert"},
-	})
-
-	-- Sandstone
-
-	minetest.register_ore({
-		ore_type        = "stratum",
-		ore             = "default:sandstone",
-		wherein         = {"default:desert_stone"},
-		clust_scarcity  = 1,
-		y_max           = 39,
-		y_min           = 3,
-		noise_params    = {
-			offset = 21,
-			scale = 16,
-			spread = {x = 128, y = 128, z = 128},
-			seed = 90122,
-			octaves = 1,
-		},
-		stratum_thickness = 2,
-		biomes = {"desert"},
-	})
-
-	-- Blob ore.
-	-- These before scatter ores to avoid other ores in blobs.
-
-	-- Clay
-
-	minetest.register_ore({
-		ore_type        = "blob",
-		ore             = "default:clay",
-		wherein         = {"default:sand"},
-		clust_scarcity  = 16 * 16 * 16,
-		clust_size      = 5,
-		y_max           = 0,
-		y_min           = -15,
-		noise_threshold = 0.0,
-		noise_params    = {
-			offset = 0.5,
-			scale = 0.2,
-			spread = {x = 5, y = 5, z = 5},
-			seed = -316,
-			octaves = 1,
-			persist = 0.0
-		},
-	})
-
-	-- Silver sand
-
-	minetest.register_ore({
-		ore_type        = "blob",
-		ore             = "default:silver_sand",
-		wherein         = {"default:stone"},
-		clust_scarcity  = 16 * 16 * 16,
-		clust_size      = 5,
-		y_max           = 31000,
-		y_min           = -31000,
-		noise_threshold = 0.0,
-		noise_params    = {
-			offset = 0.5,
-			scale = 0.2,
-			spread = {x = 5, y = 5, z = 5},
-			seed = 2316,
-			octaves = 1,
-			persist = 0.0
-		},
-	})
-
-	-- Dirt
-
-	minetest.register_ore({
-		ore_type        = "blob",
-		ore             = "default:dirt",
-		wherein         = {"default:stone"},
-		clust_scarcity  = 16 * 16 * 16,
-		clust_size      = 5,
-		y_max           = 31000,
-		y_min           = -31,
-		noise_threshold = 0.0,
-		noise_params    = {
-			offset = 0.5,
-			scale = 0.2,
-			spread = {x = 5, y = 5, z = 5},
-			seed = 17676,
-			octaves = 1,
-			persist = 0.0
-		},
-		-- Only where default:dirt is present as surface material
-		biomes = {"taiga", "snowy_grassland", "grassland", "coniferous_forest",
-				"deciduous_forest", "deciduous_forest_shore", "rainforest",
-				"rainforest_swamp", "floatland_coniferous_forest"}
-	})
-
-	-- Gravel
-
-	minetest.register_ore({
-		ore_type        = "blob",
-		ore             = "default:gravel",
-		wherein         = {"default:stone"},
-		clust_scarcity  = 16 * 16 * 16,
-		clust_size      = 5,
-		y_max           = 31000,
-		y_min           = -31000,
-		noise_threshold = 0.0,
-		noise_params    = {
-			offset = 0.5,
-			scale = 0.2,
-			spread = {x = 5, y = 5, z = 5},
-			seed = 766,
-			octaves = 1,
-			persist = 0.0
-		},
-	})
-
-	-- Scatter ores
-
-	-- Coal
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_coal",
-		wherein        = "default:stone",
-		clust_scarcity = 8 * 8 * 8,
-		clust_num_ores = 9,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_coal",
-		wherein        = "default:stone",
-		clust_scarcity = 8 * 8 * 8,
-		clust_num_ores = 8,
-		clust_size     = 3,
-		y_max          = 64,
-		y_min          = -127,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_coal",
-		wherein        = "default:stone",
-		clust_scarcity = 12 * 12 * 12,
-		clust_num_ores = 30,
-		clust_size     = 5,
-		y_max          = -128,
-		y_min          = -31000,
-	})
-
-	-- Tin
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_tin",
-		wherein        = "default:stone",
-		clust_scarcity = 10 * 10 * 10,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_tin",
-		wherein        = "default:stone",
-		clust_scarcity = 13 * 13 * 13,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = -64,
-		y_min          = -127,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_tin",
-		wherein        = "default:stone",
-		clust_scarcity = 10 * 10 * 10,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = -128,
-		y_min          = -31000,
-	})
-
-	-- Copper
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_copper",
-		wherein        = "default:stone",
-		clust_scarcity = 9 * 9 * 9,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_copper",
-		wherein        = "default:stone",
-		clust_scarcity = 12 * 12 * 12,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = -64,
-		y_min          = -127,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_copper",
-		wherein        = "default:stone",
-		clust_scarcity = 9 * 9 * 9,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = -128,
-		y_min          = -31000,
-	})
-
-	-- Iron
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_zersium",
-		wherein        = "default:stone",
-		clust_scarcity = 9 * 9 * 9,
-		clust_num_ores = 12,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_zersium",
-		wherein        = "default:stone",
-		clust_scarcity = 7 * 7 * 7,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = -128,
-		y_min          = -255,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_zersium",
-		wherein        = "default:stone",
-		clust_scarcity = 12 * 12 * 12,
-		clust_num_ores = 29,
-		clust_size     = 5,
-		y_max          = -256,
-		y_min          = -31000,
-	})
-
-	-- Gold
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_gold",
-		wherein        = "default:stone",
-		clust_scarcity = 13 * 13 * 13,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_gold",
-		wherein        = "default:stone",
-		clust_scarcity = 15 * 15 * 15,
-		clust_num_ores = 3,
-		clust_size     = 2,
-		y_max          = -256,
-		y_min          = -511,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_gold",
-		wherein        = "default:stone",
-		clust_scarcity = 13 * 13 * 13,
-		clust_num_ores = 5,
-		clust_size     = 3,
-		y_max          = -512,
-		y_min          = -31000,
-	})
-
-
-	-- Diamond
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_beskar",
-		wherein        = "default:stone",
-		clust_scarcity = 15 * 15 * 15,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = 31000,
-		y_min          = 1025,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_beskar",
-		wherein        = "default:stone",
-		clust_scarcity = 17 * 17 * 17,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = -1024,
-		y_min          = -2047,
-	})
-
-	minetest.register_ore({
-		ore_type       = "scatter",
-		ore            = "default:stone_with_beskar",
-		wherein        = "default:stone",
-		clust_scarcity = 15 * 15 * 15,
-		clust_num_ores = 4,
-		clust_size     = 3,
-		y_max          = -2048,
-		y_min          = -31000,
-	})
-end
-
-
---
--- Register biomes
---
-
--- All mapgens except mgv6
-
-function default.register_biomes(upper_limit)
-
-	-- Icesheet
-
-	minetest.register_biome({
-		name = "icesheet",
-		node_dust = "default:snow_block",
-		node_top = "default:snow_block",
-		depth_top = 1,
-		node_filler = "default:snow_block",
-		depth_filler = 3,
-		node_stone = "default:cave_ice",
-		node_water_top = "default:ice",
-		depth_water_top = 10,
-		node_river_water = "default:ice",
-		node_riverbed = "default:gravel",
-		depth_riverbed = 2,
-		node_dungeon = "default:ice",
-		node_dungeon_stair = "stairs:stair_ice",
-		y_max = upper_limit,
-		y_min = -8,
-		heat_point = 0,
-		humidity_point = 73,
-	})
-
-	minetest.register_biome({
-		name = "icesheet_ocean",
-		node_dust = "default:snow_block",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_water_top = "default:ice",
-		depth_water_top = 10,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -9,
-		y_min = -255,
-		heat_point = 0,
-		humidity_point = 73,
-	})
-
-	minetest.register_biome({
-		name = "icesheet_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 0,
-		humidity_point = 73,
-	})
-
-	-- Tundra
-
-	minetest.register_biome({
-		name = "tundra_highland",
-		node_dust = "default:snow",
-		node_riverbed = "default:gravel",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = upper_limit,
-		y_min = 47,
-		heat_point = 0,
-		humidity_point = 40,
-	})
-
-	minetest.register_biome({
-		name = "tundra",
-		node_top = "default:permafrost_with_stones",
-		depth_top = 1,
-		node_filler = "default:permafrost",
-		depth_filler = 1,
-		node_riverbed = "default:gravel",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 4,
-		y_max = 46,
-		y_min = 2,
-		heat_point = 0,
-		humidity_point = 40,
-	})
-
-	minetest.register_biome({
-		name = "tundra_beach",
-		node_top = "default:gravel",
-		depth_top = 1,
-		node_filler = "default:gravel",
-		depth_filler = 2,
-		node_riverbed = "default:gravel",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = 1,
-		y_min = -3,
-		heat_point = 0,
-		humidity_point = 40,
-	})
-
-	minetest.register_biome({
-		name = "tundra_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:gravel",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = -4,
-		y_min = -255,
-		heat_point = 0,
-		humidity_point = 40,
-	})
-
-	minetest.register_biome({
-		name = "tundra_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 0,
-		humidity_point = 40,
-	})
-
-	-- Taiga
-
-	minetest.register_biome({
-		name = "taiga",
-		node_dust = "default:snow",
-		node_top = "default:dirt_with_snow",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = upper_limit,
-		y_min = 4,
-		heat_point = 25,
-		humidity_point = 70,
-	})
-
-	minetest.register_biome({
-		name = "taiga_ocean",
-		node_dust = "default:snow",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = 3,
-		y_min = -255,
-		heat_point = 25,
-		humidity_point = 70,
-	})
-
-	minetest.register_biome({
-		name = "taiga_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 25,
-		humidity_point = 70,
-	})
-
-	-- Snowy grassland
-
-	minetest.register_biome({
-		name = "snowy_grassland",
-		node_dust = "default:snow",
-		node_top = "default:dirt_with_snow",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 1,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = upper_limit,
-		y_min = 4,
-		heat_point = 20,
-		humidity_point = 35,
-	})
-
-	minetest.register_biome({
-		name = "snowy_grassland_ocean",
-		node_dust = "default:snow",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = 3,
-		y_min = -255,
-		heat_point = 20,
-		humidity_point = 35,
-	})
-
-	minetest.register_biome({
-		name = "snowy_grassland_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 20,
-		humidity_point = 35,
-	})
-
-	-- Grassland
-
-	minetest.register_biome({
-		name = "grassland",
-		node_top = "default:dirt_with_grass",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 1,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = upper_limit,
-		y_min = 6,
-		heat_point = 50,
-		humidity_point = 35,
-	})
-
-	minetest.register_biome({
-		name = "grassland_dunes",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 2,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = 5,
-		y_min = 4,
-		heat_point = 50,
-		humidity_point = 35,
-	})
-
-	minetest.register_biome({
-		name = "grassland_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = 3,
-		y_min = -255,
-		heat_point = 50,
-		humidity_point = 35,
-	})
-
-	minetest.register_biome({
-		name = "grassland_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 50,
-		humidity_point = 35,
-	})
-
-	-- Coniferous forest
-
-	minetest.register_biome({
-		name = "coniferous_forest",
-		node_top = "default:dirt_with_coniferous_litter",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = upper_limit,
-		y_min = 6,
-		heat_point = 45,
-		humidity_point = 70,
-	})
-
-	minetest.register_biome({
-		name = "coniferous_forest_dunes",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = 5,
-		y_min = 4,
-		heat_point = 45,
-		humidity_point = 70,
-	})
-
-	minetest.register_biome({
-		name = "coniferous_forest_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = 3,
-		y_min = -255,
-		heat_point = 45,
-		humidity_point = 70,
-	})
-
-	minetest.register_biome({
-		name = "coniferous_forest_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 45,
-		humidity_point = 70,
-	})
-
-	-- Deciduous forest
-
-	minetest.register_biome({
-		name = "deciduous_forest",
-		node_top = "default:dirt_with_grass",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = upper_limit,
-		y_min = 1,
-		heat_point = 60,
-		humidity_point = 68,
-	})
-
-	minetest.register_biome({
-		name = "deciduous_forest_shore",
-		node_top = "default:dirt",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = 0,
-		y_min = -1,
-		heat_point = 60,
-		humidity_point = 68,
-	})
-
-	minetest.register_biome({
-		name = "deciduous_forest_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = -2,
-		y_min = -255,
-		heat_point = 60,
-		humidity_point = 68,
-	})
-
-	minetest.register_biome({
-		name = "deciduous_forest_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 60,
-		humidity_point = 68,
-	})
-
-	-- Desert
-
-	minetest.register_biome({
-		name = "desert",
-		node_top = "default:desert_sand",
-		depth_top = 1,
-		node_filler = "default:desert_sand",
-		depth_filler = 1,
-		node_stone = "default:desert_stone",
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:desert_stone",
-		node_dungeon_stair = "stairs:stair_desert_stone",
-		y_max = upper_limit,
-		y_min = 4,
-		heat_point = 92,
-		humidity_point = 16,
-	})
-
-	minetest.register_biome({
-		name = "desert_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_stone = "default:desert_stone",
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:desert_stone",
-		node_dungeon_stair = "stairs:stair_desert_stone",
-		vertical_blend = 1,
-		y_max = 3,
-		y_min = -255,
-		heat_point = 92,
-		humidity_point = 16,
-	})
-
-	minetest.register_biome({
-		name = "desert_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 92,
-		humidity_point = 16,
-	})
-
-	-- Sandstone desert
-
-	minetest.register_biome({
-		name = "sandstone_desert",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 1,
-		node_stone = "default:sandstone",
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:sandstonebrick",
-		node_dungeon_stair = "stairs:stair_sandstone_block",
-		y_max = upper_limit,
-		y_min = 4,
-		heat_point = 60,
-		humidity_point = 0,
-	})
-
-	minetest.register_biome({
-		name = "sandstone_desert_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_stone = "default:sandstone",
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:sandstonebrick",
-		node_dungeon_stair = "stairs:stair_sandstone_block",
-		y_max = 3,
-		y_min = -255,
-		heat_point = 60,
-		humidity_point = 0,
-	})
-
-	minetest.register_biome({
-		name = "sandstone_desert_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 60,
-		humidity_point = 0,
-	})
-
-	-- Cold desert
-
-	minetest.register_biome({
-		name = "cold_desert",
-		node_top = "default:silver_sand",
-		depth_top = 1,
-		node_filler = "default:silver_sand",
-		depth_filler = 1,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = upper_limit,
-		y_min = 4,
-		heat_point = 40,
-		humidity_point = 0,
-	})
-
-	minetest.register_biome({
-		name = "cold_desert_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = 3,
-		y_min = -255,
-		heat_point = 40,
-		humidity_point = 0,
-	})
-
-	minetest.register_biome({
-		name = "cold_desert_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 40,
-		humidity_point = 0,
-	})
-
-	-- Savanna
-
-	minetest.register_biome({
-		name = "savanna",
-		node_top = "default:dry_dirt_with_dry_grass",
-		depth_top = 1,
-		node_filler = "default:dry_dirt",
-		depth_filler = 1,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = upper_limit,
-		y_min = 1,
-		heat_point = 89,
-		humidity_point = 42,
-	})
-
-	minetest.register_biome({
-		name = "savanna_shore",
-		node_top = "default:dry_dirt",
-		depth_top = 1,
-		node_filler = "default:dry_dirt",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = 0,
-		y_min = -1,
-		heat_point = 89,
-		humidity_point = 42,
-	})
-
-	minetest.register_biome({
-		name = "savanna_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = -2,
-		y_min = -255,
-		heat_point = 89,
-		humidity_point = 42,
-	})
-
-	minetest.register_biome({
-		name = "savanna_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 89,
-		humidity_point = 42,
-	})
-
-	-- Rainforest
-
-	minetest.register_biome({
-		name = "rainforest",
-		node_top = "default:dirt_with_rainforest_litter",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = upper_limit,
-		y_min = 1,
-		heat_point = 86,
-		humidity_point = 65,
-	})
-
-	minetest.register_biome({
-		name = "rainforest_swamp",
-		node_top = "default:dirt",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = 0,
-		y_min = -1,
-		heat_point = 86,
-		humidity_point = 65,
-	})
-
-	minetest.register_biome({
-		name = "rainforest_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		node_cave_liquid = "default:water_source",
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		vertical_blend = 1,
-		y_max = -2,
-		y_min = -255,
-		heat_point = 86,
-		humidity_point = 65,
-	})
-
-	minetest.register_biome({
-		name = "rainforest_under",
-		node_cave_liquid = {"default:water_source", "default:lava_source"},
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = -256,
-		y_min = -31000,
-		heat_point = 86,
-		humidity_point = 65,
-	})
-end
-
-
--- Biomes for floatlands
-
--- TODO Temporary simple biomes to be replaced by special floatland biomes later.
-
-function default.register_floatland_biomes(floatland_level, shadow_limit)
-
-	minetest.register_biome({
-		name = "floatland_grassland",
-		node_top = "default:dirt_with_grass",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 1,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = 31000,
-		y_min = floatland_level + 2,
-		heat_point = 50,
-		humidity_point = 25,
-	})
-
-	minetest.register_biome({
-		name = "floatland_coniferous_forest",
-		node_top = "default:dirt_with_coniferous_litter",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 3,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = 31000,
-		y_min = floatland_level + 2,
-		heat_point = 50,
-		humidity_point = 75,
-	})
-
-	minetest.register_biome({
-		name = "floatland_ocean",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_dungeon = "default:cobble",
-		node_dungeon_alt = "default:cobble_mossy",
-		node_dungeon_stair = "stairs:stair_cobble",
-		y_max = floatland_level + 1,
-		y_min = shadow_limit,
-		heat_point = 50,
-		humidity_point = 50,
-	})
-end
-
-
---
--- Register decorations
---
-
--- Mgv6
-
-function default.register_mgv6_decorations()
-
-	-- Papyrus
-
-	minetest.register_decoration({
-		name = "default:reeds",
-		deco_type = "simple",
-		place_on = {"ethereal:grass_dirt"},
-		sidelen = 16,
-		noise_params = {
-			offset = -0.3,
-			scale = 0.7,
-			spread = {x = 100, y = 100, z = 100},
-			seed = 354,
-			octaves = 3,
-			persist = 0.7
-		},
-		y_max = 1,
-		y_min = 1,
-		decoration = "default:reeds",
-		height = 2,
-		height_max = 4,
-		spawn_by = "default:water_source",
-		num_spawn_by = 1,
-	})
-
-	-- Cacti
-
-	minetest.register_decoration({
-		name = "default:cactus",
-		deco_type = "simple",
-		place_on = {"default:desert_sand"},
-		sidelen = 16,
-		noise_params = {
-			offset = -0.012,
-			scale = 0.024,
-			spread = {x = 100, y = 100, z = 100},
-			seed = 230,
-			octaves = 3,
-			persist = 0.6
-		},
-		y_max = 30,
-		y_min = 1,
-		decoration = "default:cactus",
-		height = 3,
-	        height_max = 4,
-	})
-
-	-- Long grasses
-
-	for length = 1, 5 do
-		minetest.register_decoration({
-			name = "default:grass_"..length,
-			deco_type = "simple",
-			place_on = {"ethereal:grass_dirt"},
-			sidelen = 16,
-			noise_params = {
-				offset = 0,
-				scale = 0.007,
-				spread = {x = 100, y = 100, z = 100},
-				seed = 329,
-				octaves = 3,
-				persist = 0.6
-			},
-			y_max = 30,
-			y_min = 1,
-			decoration = "default:grass_"..length,
-		})
-	end
-
-	-- Dry shrubs
-
-	minetest.register_decoration({
-		name = "default:dry_shrub",
-		deco_type = "simple",
-		place_on = {"default:desert_sand", "default:dirt_with_snow"},
-		sidelen = 16,
-		noise_params = {
-			offset = 0,
-			scale = 0.035,
-			spread = {x = 100, y = 100, z = 100},
-			seed = 329,
-			octaves = 3,
-			persist = 0.6
-		},
-		y_max = 30,
-		y_min = 1,
-		decoration = "default:dry_shrub",
-		param2 = 4,
-	})
-end
-
-
--- All mapgens except mgv6
-
-local function register_grass_decoration(offset, scale, length)
-	minetest.register_decoration({
-		name = "default:grass_" .. length,
-		deco_type = "simple",
-		place_on = {"ethereal:grass_dirt"},
-		sidelen = 16,
-		noise_params = {
-			offset = offset,
-			scale = scale,
-			spread = {x = 200, y = 200, z = 200},
-			seed = 329,
-			octaves = 3,
-			persist = 0.6
-		},
-		biomes = {"grassland", "deciduous_forest", "floatland_grassland"},
-		y_max = 31000,
-		y_min = 1,
-		decoration = "default:grass_" .. length,
-	})
-end
-
-local function register_dry_grass_decoration(offset, scale, length)
-	minetest.register_decoration({
-		name = "default:dry_grass_" .. length,
-		deco_type = "simple",
-		place_on = {"ethereal:savanna_dirt"},
-		sidelen = 16,
-		noise_params = {
-			offset = offset,
-			scale = scale,
-			spread = {x = 200, y = 200, z = 200},
-			seed = 329,
-			octaves = 3,
-			persist = 0.6
-		},
-		biomes = {"savanna"},
-		y_max = 31000,
-		y_min = 1,
-		decoration = "default:dry_grass_" .. length,
-	})
-end
-
-local function register_fern_decoration(seed, length)
-	minetest.register_decoration({
-		name = "default:fern_" .. length,
-		deco_type = "simple",
-		place_on = {"ethereal:jungle_dirt"},
-		sidelen = 16,
-		noise_params = {
-			offset = 0,
-			scale = 0.2,
-			spread = {x = 100, y = 100, z = 100},
-			seed = seed,
-			octaves = 3,
-			persist = 0.7
-		},
-		biomes = {"coniferous_forest", "floatland_coniferous_forest"},
-		y_max = 31000,
-		y_min = 6,
-		decoration = "default:fern_" .. length,
-	})
-end
-
-
-function default.register_decorations()
-	-- Savanna bare dirt patches.
-	-- Must come before all savanna decorations that are placed on dry grass.
-	-- Noise is similar to long dry grass noise, but scale inverted, to appear
-	-- where long dry grass is least dense and shortest.
-
-	minetest.register_decoration({
-		deco_type = "simple",
-		place_on = {"default:dry_dirt_with_dry_grass"},
-		sidelen = 4,
-		noise_params = {
-			offset = -1.5,
-			scale = -1.5,
-			spread = {x = 200, y = 200, z = 200},
-			seed = 329,
-			octaves = 4,
-			persist = 1.0
-		},
-		biomes = {"savanna"},
-		y_max = 31000,
-		y_min = 1,
-		decoration = "default:dry_dirt",
-		place_offset_y = -1,
-		flags = "force_placement",
-	})
-
-	-- Taiga and temperate coniferous forest pine tree, small pine tree and log
-
-	minetest.register_decoration({
-		name = "default:pine_tree",
-		deco_type = "schematic",
-		place_on = {"default:dirt_with_snow", "default:dirt_with_coniferous_litter"},
-		sidelen = 16,
-		noise_params = {
-			offset = 0.010,
-			scale = 0.048,
-			spread = {x = 250, y = 250, z = 250},
-			seed = 2,
-			octaves = 3,
-			persist = 0.66
-		},
-		biomes = {"taiga", "coniferous_forest", "floatland_coniferous_forest"},
-		y_max = 31000,
-		y_min = 4,
-		schematic = minetest.get_modpath("default") .. "/schematics/pine_tree.mts",
-		flags = "place_center_x, place_center_z",
-	})
-
-	minetest.register_decoration({
-		name = "default:small_pine_tree",
-		deco_type = "schematic",
-		place_on = {"default:dirt_with_snow", "default:dirt_with_coniferous_litter"},
-		sidelen = 16,
-		noise_params = {
-			offset = 0.010,
-			scale = -0.048,
-			spread = {x = 250, y = 250, z = 250},
-			seed = 2,
-			octaves = 3,
-			persist = 0.66
-		},
-		biomes = {"taiga", "coniferous_forest", "floatland_coniferous_forest"},
-		y_max = 31000,
-		y_min = 4,
-		schematic = minetest.get_modpath("default") .. "/schematics/small_pine_tree.mts",
-		flags = "place_center_x, place_center_z",
-	})
-
-	minetest.register_decoration({
-		name = "default:pine_log",
-		deco_type = "schematic",
-		place_on = {"default:dirt_with_snow", "default:dirt_with_coniferous_litter"},
-		place_offset_y = 1,
-		sidelen = 80,
-		fill_ratio = 0.0018,
-		biomes = {"taiga", "coniferous_forest", "floatland_coniferous_forest"},
-		y_max = 31000,
-		y_min = 4,
-		schematic = minetest.get_modpath("default") .. "/schematics/pine_log.mts",
-		flags = "place_center_x",
-		rotation = "random",
-		spawn_by = {"default:dirt_with_snow", "default:dirt_with_coniferous_litter"},
-		num_spawn_by = 8,
-	})
-
-	-- Acacia tree and log
-
-	minetest.register_decoration({
-		name = "default:acacia_tree",
-		deco_type = "schematic",
-		place_on = {"default:dry_dirt_with_dry_grass"},
-		sidelen = 16,
-		noise_params = {
-			offset = 0,
-			scale = 0.002,
-			spread = {x = 250, y = 250, z = 250},
-			seed = 2,
-			octaves = 3,
-			persist = 0.66
-		},
-		biomes = {"savanna"},
-		y_max = 31000,
-		y_min = 1,
-		schematic = minetest.get_modpath("default") .. "/schematics/acacia_tree.mts",
-		flags = "place_center_x, place_center_z",
-		rotation = "random",
-	})
-
-	minetest.register_decoration({
-		name = "default:acacia_log",
-		deco_type = "schematic",
-		place_on = {"default:dry_dirt_with_dry_grass"},
-		place_offset_y = 1,
-		sidelen = 16,
-		noise_params = {
-			offset = 0,
-			scale = 0.001,
-			spread = {x = 250, y = 250, z = 250},
-			seed = 2,
-			octaves = 3,
-			persist = 0.66
-		},
-		biomes = {"savanna"},
-		y_max = 31000,
-		y_min = 1,
-		schematic = minetest.get_modpath("default") .. "/schematics/acacia_log.mts",
-		flags = "place_center_x",
-		rotation = "random",
-		spawn_by = "default:dry_dirt_with_dry_grass",
-		num_spawn_by = 8,
-	})
-
-	-- Aspen tree and log
-
-	minetest.register_decoration({
-		name = "default:aspen_tree",
-		deco_type = "schematic",
-		place_on = {"default:dirt_with_grass"},
-		sidelen = 16,
-		noise_params = {
-			offset = 0.0,
-			scale = -0.015,
-			spread = {x = 250, y = 250, z = 250},
-			seed = 2,
-			octaves = 3,
-			persist = 0.66
-		},
-		biomes = {"deciduous_forest"},
-		y_max = 31000,
-		y_min = 1,
-		schematic = minetest.get_modpath("default") .. "/schematics/aspen_tree.mts",
-		flags = "place_center_x, place_center_z",
-	})
-
-	minetest.register_decoration({
-		name = "default:aspen_log",
-		deco_type = "schematic",
-		place_on = {"default:dirt_with_grass"},
-		place_offset_y = 1,
-		sidelen = 16,
-		noise_params = {
-			offset = 0.0,
-			scale = -0.0008,
-			spread = {x = 250, y = 250, z = 250},
-			seed = 2,
-			octaves = 3,
-			persist = 0.66
-		},
-		biomes = {"deciduous_forest"},
-		y_max = 31000,
-		y_min = 1,
-		schematic = minetest.get_modpath("default") .. "/schematics/aspen_log.mts",
-		flags = "place_center_x",
-		rotation = "random",
-		spawn_by = "default:dirt_with_grass",
-		num_spawn_by = 8,
-	})
-
-	-- Large cactus
-
-	minetest.register_decoration({
-		name = "default:large_cactus",
-		deco_type = "schematic",
-		place_on = {"default:desert_sand"},
-		sidelen = 16,
-		noise_params = {
-			offset = -0.0003,
-			scale = 0.0009,
-			spread = {x = 200, y = 200, z = 200},
-			seed = 230,
-			octaves = 3,
-			persist = 0.6
-		},
-		biomes = {"desert"},
-		y_max = 31000,
-		y_min = 4,
-		schematic = minetest.get_modpath("default") .. "/schematics/large_cactus.mts",
-		flags = "place_center_x, place_center_z",
-		rotation = "random",
-	})
-
-	-- Cactus
-
-	minetest.register_decoration({
-		name = "default:cactus",
-		deco_type = "simple",
-		place_on = {"default:desert_sand"},
-		sidelen = 16,
-		noise_params = {
-			offset = -0.0003,
-			scale = 0.0009,
-			spread = {x = 200, y = 200, z = 200},
-			seed = 230,
-			octaves = 3,
-			persist = 0.6
-		},
-		biomes = {"desert"},
-		y_max = 31000,
-		y_min = 4,
-		decoration = "default:cactus",
-		height = 2,
-		height_max = 5,
-	})
-
-	-- Papyrus
-
-	minetest.register_decoration({
-		name = "default:papyrus",
-		deco_type = "schematic",
-		place_on = {"default:dirt"},
-		sidelen = 16,
-		noise_params = {
-			offset = -0.3,
-			scale = 0.7,
-			spread = {x = 200, y = 200, z = 200},
-			seed = 354,
-			octaves = 3,
-			persist = 0.7
-		},
-		biomes = {"savanna_shore", "rainforest_swamp"},
-		y_max = 0,
-		y_min = 0,
-		schematic = minetest.get_modpath("default") .. "/schematics/papyrus.mts",
-	})
-
-	-- Bush
-
-	minetest.register_decoration({
-		name = "default:bush",
-		deco_type = "schematic",
-		place_on = {"default:dirt_with_grass"},
-		sidelen = 16,
-		noise_params = {
-			offset = -0.004,
-			scale = 0.01,
-			spread = {x = 100, y = 100, z = 100},
-			seed = 137,
-			octaves = 3,
-			persist = 0.7,
-		},
-		biomes = {"grassland", "deciduous_forest",
-			"floatland_grassland"},
-		y_max = 31000,
-		y_min = 1,
-		schematic = minetest.get_modpath("default") .. "/schematics/bush.mts",
-		flags = "place_center_x, place_center_z",
-	})
-
-	-- Blueberry bush
-
-	minetest.register_decoration({
-		name = "default:blueberry_bush",
-		deco_type = "schematic",
-		place_on = {"default:dirt_with_grass", "default:dirt_with_snow"},
-		sidelen = 16,
-		noise_params = {
-			offset = -0.004,
-			scale = 0.01,
-			spread = {x = 100, y = 100, z = 100},
-			seed = 697,
-			octaves = 3,
-			persist = 0.7,
-		},
-		biomes = {"grassland", "snowy_grassland"},
-		y_max = 31000,
-		y_min = 1,
-		place_offset_y = 1,
-		schematic = minetest.get_modpath("default") .. "/schematics/blueberry_bush.mts",
-		flags = "place_center_x, place_center_z",
-	})
-
-	-- Acacia bush
-
-	minetest.register_decoration({
-		name = "default:acacia_bush",
-		deco_type = "schematic",
-		place_on = {"default:dry_dirt_with_dry_grass"},
-		sidelen = 16,
-		noise_params = {
-			offset = -0.004,
-			scale = 0.01,
-			spread = {x = 100, y = 100, z = 100},
-			seed = 90155,
-			octaves = 3,
-			persist = 0.7,
-		},
-		biomes = {"savanna"},
-		y_max = 31000,
-		y_min = 1,
-		schematic = minetest.get_modpath("default") .. "/schematics/acacia_bush.mts",
-		flags = "place_center_x, place_center_z",
-	})
-
-	-- Pine bush
-
-	minetest.register_decoration({
-		name = "default:pine_bush",
-		deco_type = "schematic",
-		place_on = {"default:dirt_with_snow"},
-		sidelen = 16,
-		noise_params = {
-			offset = -0.004,
-			scale = 0.01,
-			spread = {x = 100, y = 100, z = 100},
-			seed = 137,
-			octaves = 3,
-			persist = 0.7,
-		},
-		biomes = {"taiga", "snowy_grassland"},
-		y_max = 31000,
-		y_min = 4,
-		schematic = minetest.get_modpath("default") .. "/schematics/pine_bush.mts",
-		flags = "place_center_x, place_center_z",
-	})
-
-	-- Grasses
-
-	register_grass_decoration(-0.03,  0.09,  5)
-	register_grass_decoration(-0.015, 0.075, 4)
-	register_grass_decoration(0,      0.06,  3)
-	register_grass_decoration(0.015,  0.045, 2)
-	register_grass_decoration(0.03,   0.03,  1)
-
-	-- Dry grasses
-
-	register_dry_grass_decoration(0.01, 0.05,  5)
-	register_dry_grass_decoration(0.03, 0.03,  4)
-	register_dry_grass_decoration(0.05, 0.01,  3)
-	register_dry_grass_decoration(0.07, -0.01, 2)
-	register_dry_grass_decoration(0.09, -0.03, 1)
-
-	-- Ferns
-
-	register_fern_decoration(14936, 3)
-	register_fern_decoration(801,   2)
-	register_fern_decoration(5,     1)
-
-	-- Junglegrass
-
-	minetest.register_decoration({
-		name = "default:junglegrass",
-		deco_type = "simple",
-		place_on = {"default:dirt_with_rainforest_litter"},
-		sidelen = 80,
-		fill_ratio = 0.1,
-		biomes = {"rainforest"},
-		y_max = 31000,
-		y_min = 1,
-		decoration = "default:junglegrass",
-	})
-
-	-- Dry shrub
-
-	minetest.register_decoration({
-		name = "default:dry_shrub",
-		deco_type = "simple",
-		place_on = {"default:desert_sand",
-			"default:sand", "default:silver_sand"},
-		sidelen = 16,
-		noise_params = {
-			offset = 0,
-			scale = 0.02,
-			spread = {x = 200, y = 200, z = 200},
-			seed = 329,
-			octaves = 3,
-			persist = 0.6
-		},
-		biomes = {"desert", "sandstone_desert", "cold_desert"},
-		y_max = 31000,
-		y_min = 2,
-		decoration = "default:dry_shrub",
-		param2 = 4,
-	})
-
-	-- Marram grass
-
-	minetest.register_decoration({
-		name = "default:marram_grass",
-		deco_type = "simple",
-		place_on = {"default:sand"},
-		sidelen = 4,
-		noise_params = {
-			offset = -0.7,
-			scale = 4.0,
-			spread = {x = 16, y = 16, z = 16},
-			seed = 513337,
-			octaves = 1,
-			persist = 0.0,
-			flags = "absvalue, eased"
-		},
-		biomes = {"coniferous_forest_dunes", "grassland_dunes"},
-		y_max = 6,
-		y_min = 4,
-		decoration = {
-			"default:marram_grass_1",
-			"default:marram_grass_2",
-			"default:marram_grass_3",
-		},
-	})
-
-	-- Tundra moss
-
-	minetest.register_decoration({
-		deco_type = "simple",
-		place_on = {"default:permafrost_with_stones"},
-		sidelen = 4,
-		noise_params = {
-			offset = -0.8,
-			scale = 2.0,
-			spread = {x = 100, y = 100, z = 100},
-			seed = 53995,
-			octaves = 3,
-			persist = 1.0
-		},
-		biomes = {"tundra"},
-		y_max = 50,
-		y_min = 2,
-		decoration = "default:permafrost_with_moss",
-		place_offset_y = -1,
-		flags = "force_placement",
-	})
-
-	-- Tundra patchy snow
-
-	minetest.register_decoration({
-		deco_type = "simple",
-		place_on = {
-			"default:permafrost_with_moss",
-			"default:permafrost_with_stones",
-			"default:stone",
-			"default:gravel"
-		},
-		sidelen = 4,
-		noise_params = {
-			offset = 0,
-			scale = 1.0,
-			spread = {x = 100, y = 100, z = 100},
-			seed = 172555,
-			octaves = 3,
-			persist = 1.0
-		},
-		biomes = {"tundra", "tundra_beach"},
-		y_max = 50,
-		y_min = 1,
-		decoration = "default:snow",
-	})
-
-	-- Coral reef
-
-	minetest.register_decoration({
-		name = "default:corals",
-		deco_type = "simple",
-		place_on = {"default:sand"},
-		place_offset_y = -1,
-		sidelen = 4,
-		noise_params = {
-			offset = -4,
-			scale = 4,
-			spread = {x = 50, y = 50, z = 50},
-			seed = 7013,
-			octaves = 3,
-			persist = 0.7,
-		},
-		biomes = {
-			"desert_ocean",
-			"savanna_ocean",
-			"rainforest_ocean",
-		},
-		y_max = -2,
-		y_min = -8,
-		flags = "force_placement",
-		decoration = {
-			"default:coral_green", "default:coral_pink",
-			"default:coral_cyan", "default:coral_brown",
-			"default:coral_orange", "default:coral_skeleton",
-		},
-	})
-
-	-- Kelp
-
-	minetest.register_decoration({
-		name = "default:kelp",
-		deco_type = "simple",
-		place_on = {"default:sand"},
-		place_offset_y = -1,
-		sidelen = 16,
-		noise_params = {
-			offset = -0.04,
-			scale = 0.1,
-			spread = {x = 200, y = 200, z = 200},
-			seed = 87112,
-			octaves = 3,
-			persist = 0.7
-		},
-		biomes = {
-			"taiga_ocean",
-			"snowy_grassland_ocean",
-			"grassland_ocean",
-			"coniferous_forest_ocean",
-			"deciduous_forest_ocean",
-			"sandstone_desert_ocean",
-			"cold_desert_ocean"},
-		y_max = -5,
-		y_min = -10,
-		flags = "force_placement",
-		decoration = "default:sand_with_kelp",
-		param2 = 48,
-		param2_max = 96,
-	})
-end
-
-
---
--- Detect mapgen, flags and parameters to select functions
---
-
--- Get setting or default
-local mgv7_spflags = minetest.get_mapgen_setting("mgv7_spflags") or
-	"mountains, ridges, nofloatlands, caverns"
-local captures_float = string.match(mgv7_spflags, "floatlands")
-local captures_nofloat = string.match(mgv7_spflags, "nofloatlands")
-
--- Get setting or default
--- Make global for mods to use to register floatland biomes
-default.mgv7_floatland_level =
-	minetest.get_mapgen_setting("mgv7_floatland_level") or 1280
-default.mgv7_shadow_limit =
-	minetest.get_mapgen_setting("mgv7_shadow_limit") or 1024
-
-minetest.clear_registered_biomes()
-minetest.clear_registered_ores()
-minetest.clear_registered_decorations()
-
-local mg_name = minetest.get_mapgen_setting("mg_name")
-
-if mg_name == "v6" then
-	default.register_mgv6_ores()
-	default.register_mgv6_decorations()
--- Need to check for 'nofloatlands' because that contains
--- 'floatlands' which makes the second condition true.
-elseif mg_name == "v7" and
-		captures_float == "floatlands" and
-		captures_nofloat ~= "nofloatlands" then
-	-- Mgv7 with floatlands and floatland biomes
-	default.register_biomes(default.mgv7_shadow_limit - 1)
-	default.register_floatland_biomes(
-		default.mgv7_floatland_level, default.mgv7_shadow_limit)
-	default.register_ores()
-	default.register_decorations()
-else
-	default.register_biomes(31000)
-	default.register_ores()
-	default.register_decorations()
-end