diff --git a/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree.mts b/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree.mts
index c015d242dd..44ac2b5382 100644
Binary files a/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree.mts and b/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree.mts differ
diff --git a/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree_huge_1.mts b/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree_huge_1.mts
index ba4f9fa261..eefbeb4fef 100644
Binary files a/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree_huge_1.mts and b/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree_huge_1.mts differ
diff --git a/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree_huge_2.mts b/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree_huge_2.mts
index df0114f6bd..817ca023ef 100644
Binary files a/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree_huge_2.mts and b/mods/ITEMS/mcl_core/schematics/mcl_core_jungle_tree_huge_2.mts differ
diff --git a/mods/ITEMS/mcl_core/schematics/mcl_core_oak_swamp.mts b/mods/ITEMS/mcl_core/schematics/mcl_core_oak_swamp.mts
index 3308dba4a4..955f70eb50 100644
Binary files a/mods/ITEMS/mcl_core/schematics/mcl_core_oak_swamp.mts and b/mods/ITEMS/mcl_core/schematics/mcl_core_oak_swamp.mts differ
diff --git a/mods/MAPGEN/mcl_mapgen_core/world_structure.lua b/mods/MAPGEN/mcl_mapgen_core/world_structure.lua
new file mode 100644
index 0000000000..0c0ff21fd6
--- /dev/null
+++ b/mods/MAPGEN/mcl_mapgen_core/world_structure.lua
@@ -0,0 +1,381 @@
+-- End exit portal position
+local END_EXIT_PORTAL_POS = vector.new(-3, -27003, -3)
+
+local mg_flags = minetest.settings:get_flags("mg_flags")
+
+-- Inform other mods of dungeon setting for MCL2-style dungeons
+mcl_vars.mg_dungeons = mg_flags.dungeons and not superflat
+
+-- Disable builtin dungeons, we provide our own dungeons
+mg_flags.dungeons = false
+
+
+if superflat then
+	-- Enforce superflat-like mapgen: no caves, decor, lakes and hills
+	mg_flags.caves = false
+	mg_flags.decorations = false
+	minetest.set_mapgen_setting("mgflat_spflags", "nolakes,nohills", true)
+end
+
+local mg_flags_str = ""
+for k,v in pairs(mg_flags) do
+	if v == false then
+		k = "no" .. k
+	end
+	mg_flags_str = mg_flags_str .. k .. ","
+end
+if string.len(mg_flags_str) > 0 then
+	mg_flags_str = string.sub(mg_flags_str, 1, string.len(mg_flags_str)-1)
+end
+minetest.set_mapgen_setting("mg_flags", mg_flags_str, true)
+
+-- Takes an index of a biomemap table (from minetest.get_mapgen_object),
+-- minp and maxp (from an on_generated callback) and returns the real world coordinates
+-- as X, Z.
+-- Inverse function of xz_to_biomemap
+--[[local function biomemap_to_xz(index, minp, maxp)
+	local xwidth = maxp.x - minp.x + 1
+	local zwidth = maxp.z - minp.z + 1
+	local x = ((index-1) % xwidth) + minp.x
+	local z = ((index-1) / zwidth) + minp.z
+	return x, z
+end]]
+
+-- Takes x and z coordinates and minp and maxp of a generated chunk
+-- (in on_generated callback) and returns a biomemap index)
+-- Inverse function of biomemap_to_xz
+local function xz_to_biomemap_index(x, z, minp, maxp)
+	local xwidth = maxp.x - minp.x + 1
+	local zwidth = maxp.z - minp.z + 1
+	local minix = x % xwidth
+	local miniz = z % zwidth
+
+	return (minix + miniz * zwidth) + 1
+end
+
+-- Perlin noise objects
+local perlin_structures
+local perlin_vines, perlin_vines_fine, perlin_vines_upwards, perlin_vines_length, perlin_vines_density
+local perlin_clay
+
+local function generate_clay(minp, maxp, blockseed, voxelmanip_data, voxelmanip_area, lvm_used)
+	-- TODO: Make clay generation reproducible for same seed.
+	if maxp.y < -5 or minp.y > 0 then
+		return lvm_used
+	end
+
+	local pr = PseudoRandom(blockseed)
+
+	perlin_clay = perlin_clay or minetest.get_perlin({
+		offset = 0.5,
+		scale = 0.2,
+		spread = {x = 5, y = 5, z = 5},
+		seed = -316,
+		octaves = 1,
+		persist = 0.0
+	})
+
+	for y=math.max(minp.y, 0), math.min(maxp.y, -8), -1 do
+		-- Assume X and Z lengths are equal
+		local divlen = 4
+		local divs = (maxp.x-minp.x)/divlen+1;
+		for divx=0+1,divs-2 do
+		for divz=0+1,divs-2 do
+			-- Get position and shift it a bit randomly so the clay do not obviously appear in a grid
+			local cx = minp.x + math.floor((divx+0.5)*divlen) + pr:next(-1,1)
+			local cz = minp.z + math.floor((divz+0.5)*divlen) + pr:next(-1,1)
+
+			local water_pos = voxelmanip_area:index(cx, y+1, cz)
+			local waternode = voxelmanip_data[water_pos]
+			local surface_pos = voxelmanip_area:index(cx, y, cz)
+			local surfacenode = voxelmanip_data[surface_pos]
+
+			local genrnd = pr:next(1, 20)
+			if genrnd == 1 and perlin_clay:get_3d({x=cx,y=y,z=cz}) > 0 and waternode == c_water and
+					(surfacenode == c_dirt or minetest.get_item_group(minetest.get_name_from_content_id(surfacenode), "sand") == 1) then
+				local diamondsize = pr:next(1, 3)
+				for x1 = -diamondsize, diamondsize do
+				for z1 = -(diamondsize - math.abs(x1)), diamondsize - math.abs(x1) do
+					local ccpos = voxelmanip_area:index(cx+x1, y, cz+z1)
+					local claycandidate = voxelmanip_data[ccpos]
+					if voxelmanip_data[ccpos] == c_dirt or minetest.get_item_group(minetest.get_name_from_content_id(claycandidate), "sand") == 1 then
+						voxelmanip_data[ccpos] = c_clay
+						lvm_used = true
+					end
+				end
+				end
+			end
+		end
+		end
+	end
+	return lvm_used
+end
+
+local function generate_end_exit_portal(pos)
+	local obj = minetest.add_entity(vector.add(pos, vector.new(3, 11, 3)), "mobs_mc:enderdragon")
+	if obj then
+		local dragon_entity = obj:get_luaentity()
+		dragon_entity._initial = true
+		dragon_entity._portal_pos = pos
+	else
+		minetest.log("error", "[mcl_mapgen_core] ERROR! Ender dragon doesn't want to spawn")
+	end
+	mcl_structures.call_struct(pos, "end_exit_portal")
+end
+
+-- Helper function to set all nodes in the layers between min and max.
+-- content_id: Node to set
+-- check: optional.
+--	If content_id, node will be set only if it is equal to check.
+--	If function(pos_to_check, content_id_at_this_pos), will set node only if returns true.
+-- min, max: Minimum and maximum Y levels of the layers to set
+-- minp, maxp: minp, maxp of the on_generated
+-- lvm_used: Set to true if any node in this on_generated has been set before.
+--
+-- returns true if any node was set and lvm_used otherwise
+local function set_layers(data, area, content_id, check, min, max, minp, maxp, lvm_used, pr)
+	if (maxp.y >= min and minp.y <= max) then
+		for y = math.max(min, minp.y), math.min(max, maxp.y) do
+			for x = minp.x, maxp.x do
+				for z = minp.z, maxp.z do
+					local p_pos = area:index(x, y, z)
+					if check then
+						if type(check) == "function" and check({x=x,y=y,z=z}, data[p_pos], pr) then
+							data[p_pos] = content_id
+							lvm_used = true
+						elseif check == data[p_pos] then
+							data[p_pos] = content_id
+							lvm_used = true
+						end
+					else
+						data[p_pos] = content_id
+						lvm_used = true
+					end
+				end
+			end
+		end
+	end
+	return lvm_used
+end
+
+-- Generate basic layer-based nodes: void, bedrock, realm barrier, lava seas, etc.
+-- Also perform some basic node replacements.
+
+local bedrock_check
+if mcl_vars.mg_bedrock_is_rough then
+	function bedrock_check(pos, _, pr)
+		local y = pos.y
+		-- Bedrock layers with increasing levels of roughness, until a perfecly flat bedrock later at the bottom layer
+		-- This code assumes a bedrock height of 5 layers.
+
+		local diff = mcl_vars.mg_bedrock_overworld_max - y -- Overworld bedrock
+		local ndiff1 = mcl_vars.mg_bedrock_nether_bottom_max - y -- Nether bedrock, bottom
+		local ndiff2 = mcl_vars.mg_bedrock_nether_top_max - y -- Nether bedrock, ceiling
+
+		local top
+		if diff == 0 or ndiff1 == 0 or ndiff2 == 4 then
+			-- 50% bedrock chance
+			top = 2
+		elseif diff == 1 or ndiff1 == 1 or ndiff2 == 3 then
+			-- 66.666...%
+			top = 3
+		elseif diff == 2 or ndiff1 == 2 or ndiff2 == 2 then
+			-- 75%
+			top = 4
+		elseif diff == 3 or ndiff1 == 3 or ndiff2 == 1 then
+			-- 90%
+			top = 10
+		elseif diff == 4 or ndiff1 == 4 or ndiff2 == 0 then
+			-- 100%
+			return true
+		else
+			-- Not in bedrock layer
+			return false
+		end
+
+		return pr:next(1, top) <= top-1
+	end
+end
+
+-- Below the bedrock, generate air/void
+local function basic(vm, data, data2, emin, emax, area, minp, maxp, blockseed)
+	local biomemap --ymin, ymax
+	local lvm_used = false
+	local pr = PseudoRandom(blockseed)
+
+	-- The Void below the Nether:
+	lvm_used = set_layers(data, area, c_void         , nil, mcl_vars.mapgen_edge_min                     , mcl_vars.mg_nether_min                     -1, minp, maxp, lvm_used, pr)
+
+	-- [[ THE NETHER:					mcl_vars.mg_nether_min			       mcl_vars.mg_nether_max							]]
+
+	-- The Air on the Nether roof, https://git.minetest.land/MineClone2/MineClone2/issues/1186
+	lvm_used = set_layers(data, area, c_air		 , nil, mcl_vars.mg_nether_max			   +1, mcl_vars.mg_nether_max + 128                 , minp, maxp, lvm_used, pr)
+	-- The Void above the Nether below the End:
+	lvm_used = set_layers(data, area, c_void         , nil, mcl_vars.mg_nether_max + 128               +1, mcl_vars.mg_end_min                        -1, minp, maxp, lvm_used, pr)
+
+	-- [[ THE END:						mcl_vars.mg_end_min			       mcl_vars.mg_end_max							]]
+
+	-- The Void above the End below the Realm barrier:
+	lvm_used = set_layers(data, area, c_void         , nil, mcl_vars.mg_end_max                        +1, mcl_vars.mg_realm_barrier_overworld_end_min-1, minp, maxp, lvm_used, pr)
+	-- Realm barrier between the Overworld void and the End
+	lvm_used = set_layers(data, area, c_realm_barrier, nil, mcl_vars.mg_realm_barrier_overworld_end_min  , mcl_vars.mg_realm_barrier_overworld_end_max  , minp, maxp, lvm_used, pr)
+	-- The Void above Realm barrier below the Overworld:
+	lvm_used = set_layers(data, area, c_void         , nil, mcl_vars.mg_realm_barrier_overworld_end_max+1, mcl_vars.mg_overworld_min                  -1, minp, maxp, lvm_used, pr)
+
+
+	if mg_name ~= "singlenode" then
+		-- Bedrock
+		lvm_used = set_layers(data, area, c_bedrock, bedrock_check, mcl_vars.mg_bedrock_overworld_min, mcl_vars.mg_bedrock_overworld_max, minp, maxp, lvm_used, pr)
+		lvm_used = set_layers(data, area, c_bedrock, bedrock_check, mcl_vars.mg_bedrock_nether_bottom_min, mcl_vars.mg_bedrock_nether_bottom_max, minp, maxp, lvm_used, pr)
+		lvm_used = set_layers(data, area, c_bedrock, bedrock_check, mcl_vars.mg_bedrock_nether_top_min, mcl_vars.mg_bedrock_nether_top_max, minp, maxp, lvm_used, pr)
+
+		-- Flat Nether
+		if mg_name == "flat" then
+			lvm_used = set_layers(data, area, c_air, nil, mcl_vars.mg_flat_nether_floor, mcl_vars.mg_flat_nether_ceiling, minp, maxp, lvm_used, pr)
+		end
+
+		-- Big lava seas by replacing air below a certain height
+		if mcl_vars.mg_lava then
+			lvm_used = set_layers(data, area, c_lava, c_air, mcl_vars.mg_overworld_min, mcl_vars.mg_lava_overworld_max, minp, maxp, lvm_used, pr)
+			lvm_used = set_layers(data, area, c_nether_lava, c_air, mcl_vars.mg_nether_min, mcl_vars.mg_lava_nether_max, minp, maxp, lvm_used, pr)
+		end
+
+		-- Clay, vines, cocoas
+		lvm_used = generate_clay(minp, maxp, blockseed, data, area, lvm_used)
+		biomemap = minetest.get_mapgen_object("biomemap")
+
+
+		----- Interactive block fixing section -----
+		----- The section to perform basic block overrides of the core mapgen generated world. -----
+
+		-- Snow and sand fixes. This code implements snow consistency
+		-- and fixes floating sand and cut plants.
+		-- A snowy grass block must be below a top snow or snow block at all times.
+		if minp.y <= mcl_vars.mg_overworld_max and maxp.y >= mcl_vars.mg_overworld_min then
+			-- v6 mapgen:
+			if mg_name ~= "v6" then
+			-- Non-v6 mapgens:
+				-- Set param2 (=color) of grass blocks.
+				-- Clear snowy grass blocks without snow above to ensure consistency.
+				local nodes = minetest.find_nodes_in_area(minp, maxp, {"mcl_core:dirt_with_grass", "mcl_core:dirt_with_grass_snow"})
+
+				-- Flat area at y=0 to read biome 3 times faster than 5.3.0.get_biome_data(pos).biome: 43us vs 125us per iteration:
+				local aream = VoxelArea:new({MinEdge={x=minp.x, y=0, z=minp.z}, MaxEdge={x=maxp.x, y=0, z=maxp.z}})
+				for n=1, #nodes do
+					local n = nodes[n]
+					local p_pos = area:index(n.x, n.y, n.z)
+					local p_pos_above = area:index(n.x, n.y+1, n.z)
+					--local p_pos_below = area:index(n.x, n.y-1, n.z)
+					local b_pos = aream:index(n.x, 0, n.z)
+					local bn = minetest.get_biome_name(biomemap[b_pos])
+					if bn then
+						local biome = minetest.registered_biomes[bn]
+						if biome and biome._mcl_biome_type then
+							data2[p_pos] = biome._mcl_palette_index
+							lvm_used = true
+						end
+					end
+					if data[p_pos] == c_dirt_with_grass_snow and p_pos_above and data[p_pos_above] ~= c_top_snow and data[p_pos_above] ~= c_snow_block then
+						data[p_pos] = c_dirt_with_grass
+						lvm_used = true
+					end
+				end
+
+				-- Set param2 (=color) of sugar cane
+				nodes = minetest.find_nodes_in_area(minp, maxp, {"mcl_core:reeds"})
+				for n=1, #nodes do
+					local n = nodes[n]
+					local p_pos = area:index(n.x, n.y, n.z)
+					local b_pos = aream:index(n.x, 0, n.z)
+					local bn = minetest.get_biome_name(biomemap[b_pos])
+					if bn then
+						local biome = minetest.registered_biomes[bn]
+						if biome and biome._mcl_biome_type then
+							data2[p_pos] = biome._mcl_palette_index
+							lvm_used = true
+						end
+					end
+				end
+			end
+
+		-- Nether block fixes:
+		-- * Replace water with Nether lava.
+		-- * Replace stone, sand dirt in v6 so the Nether works in v6.
+		elseif emin.y <= mcl_vars.mg_nether_max and emax.y >= mcl_vars.mg_nether_min then
+			if mg_name ~= "v6" then
+				local nodes = minetest.find_nodes_in_area(emin, emax, {"group:water"})
+				for _, n in pairs(nodes) do
+					data[area:index(n.x, n.y, n.z)] = c_nether_lava
+				end
+			end
+
+		-- End block fixes:
+		-- * Replace water with end stone or air (depending on height).
+		-- * Remove stone, sand, dirt in v6 so our End map generator works in v6.
+		-- * Generate spawn platform (End portal destination)
+		elseif minp.y <= mcl_vars.mg_end_max and maxp.y >= mcl_vars.mg_end_min then
+			local nodes
+			if mg_name ~= "v6" then
+				nodes = minetest.find_nodes_in_area(emin, emax, {"mcl_core:water_source"})
+				if #nodes > 0 then
+					lvm_used = true
+					for _,n in pairs(nodes) do
+						data[area:index(n.x, n.y, n.z)] = c_air
+					end
+				end
+			end
+			-- Obsidian spawn platform
+			if minp.y <= mcl_vars.mg_end_platform_pos.y and maxp.y >= mcl_vars.mg_end_platform_pos.y and
+				minp.x <= mcl_vars.mg_end_platform_pos.x and maxp.x >= mcl_vars.mg_end_platform_pos.z and
+				minp.z <= mcl_vars.mg_end_platform_pos.z and maxp.z >= mcl_vars.mg_end_platform_pos.z then
+
+				--local pos1 = {x = math.max(minp.x, mcl_vars.mg_end_platform_pos.x-2), y = math.max(minp.y, mcl_vars.mg_end_platform_pos.y),   z = math.max(minp.z, mcl_vars.mg_end_platform_pos.z-2)}
+				--local pos2 = {x = math.min(maxp.x, mcl_vars.mg_end_platform_pos.x+2), y = math.min(maxp.y, mcl_vars.mg_end_platform_pos.y+2), z = math.min(maxp.z, mcl_vars.mg_end_platform_pos.z+2)}
+
+				for x=math.max(minp.x, mcl_vars.mg_end_platform_pos.x-2), math.min(maxp.x, mcl_vars.mg_end_platform_pos.x+2) do
+				for z=math.max(minp.z, mcl_vars.mg_end_platform_pos.z-2), math.min(maxp.z, mcl_vars.mg_end_platform_pos.z+2) do
+				for y=math.max(minp.y, mcl_vars.mg_end_platform_pos.y), math.min(maxp.y, mcl_vars.mg_end_platform_pos.y+2) do
+					local p_pos = area:index(x, y, z)
+					if y == mcl_vars.mg_end_platform_pos.y then
+						data[p_pos] = c_obsidian
+					else
+						data[p_pos] = c_air
+					end
+				end
+				end
+				end
+				lvm_used = true
+			end
+		end
+	end
+	-- Final hackery: Set sun light level in the End.
+	-- -26912 is at a mapchunk border.
+	local shadow = true
+	if minp.y >= -26912 and maxp.y <= mcl_vars.mg_end_max then
+		vm:set_lighting({day=15, night=15})
+		lvm_used = true
+	end
+	if minp.y >= mcl_vars.mg_end_min and maxp.y <= -26911 then
+		shadow = false
+		lvm_used = true
+	end
+
+	return lvm_used, shadow
+end
+
+mcl_mapgen_core.register_generator("main", basic, basic_node, 1, true)
+
+mcl_mapgen_core.register_generator("end_exit_portal",nil, function(minp, maxp, blockseed)
+	if	minp.y <= END_EXIT_PORTAL_POS.y and maxp.y >= END_EXIT_PORTAL_POS.y and
+		minp.x <= END_EXIT_PORTAL_POS.x and maxp.x >= END_EXIT_PORTAL_POS.x and
+		minp.z <= END_EXIT_PORTAL_POS.z and maxp.z >= END_EXIT_PORTAL_POS.z then
+		for y=maxp.y, minp.y, -1 do
+			local p = {x=END_EXIT_PORTAL_POS.x, y=y, z=END_EXIT_PORTAL_POS.z}
+			if minetest.get_node(p).name == "mcl_end:end_stone" then
+				generate_end_exit_portal(p)
+				return
+			end
+		end
+		generate_end_exit_portal(END_EXIT_PORTAL_POS)
+	end
+end,101,true)