Mineclonia/mods/MAPGEN/mcl_biomes/init.lua

local mg_name = minetest.get_mapgen_setting("mg_name")

-- Some mapgen settings
local imitate = minetest.settings:get("mcl_imitation_mode")

local generate_fallen_logs = false

-- Jungle bush type. Default (PC/Java Edition) is Jungle Wood + Oak Leaves
local jungle_bush_schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_jungle_bush_oak_leaves.mts"
if imitate == "pocket_edition" then
	-- Simple fallen tree trunk logs (not very good yet)
	generate_fallen_logs = true
	-- Jungle bush: Jungle Wood + Jungle Leaves
	jungle_bush_schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_jungle_bush_jungle_leaves.mts"
end

--
-- Register biomes
--

local function register_classic_superflat_biome()
	-- 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,
	})
end

-- All mapgens except mgv6, flat and singlenode
local function register_biomes()
	--[[ OVERWORLD ]]

	--[[ These biomes try to resemble MC as good as possible. 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 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 usually split in two or more parts (stacked by height), at least
	a land part and an ocean part. Sometimes there's a beach/shore part as well.

	The ocean biomes correspond to the MC Ocean biome.

	Intentionally missing biomes:
	* River (generated by valleys and v7)
	* Frozen River (generated by valleys and v7)
	* Mesa (Bryce)
	* Hills biomes
	* Plateau
	* Plateau M
	* Cold Taiga M
	* Taiga M
	* Roofed Forest M
	* Swampland M
	* Mesa Plateau F M
	* Extreme Hills Edge

	The following naming conventions apply:
	* The land biome name is equal to the MC biome name (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

	TODO:
	* Better beaches (varying height, beach and cold beach as biomes)
	* Extreme Hills+ M
	* Desert M

	Tricky biomes:
	* Mushroom Island (must be on island)
	* Stone Beach (must be at beaches only)
	TODO: Find a way to position these biomes accordingly.

	]]

	local DEEP_OCEAN_MAX = -11
	local DEEP_OCEAN_MIN = -32 -- Careful when changing this. You might end up caves covered in gravel around Y=32!
	local OCEAN_MIN = DEEP_OCEAN_MAX+1

	-- Ice Plains Spikes (rare)
	minetest.register_biome({
		name = "IcePlainsSpikes",
		node_top = "mcl_core:snowblock",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 2,
		node_river_water = "mcl_core:ice",
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		humidity_point = 24,
		heat_point = -5,
	})
	minetest.register_biome({
		name = "IcePlainsSpikes_ocean",
		node_top = "mcl_core:sand",
		depth_top = 2,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		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 = OCEAN_MIN,
		y_max = 0,
		humidity_point = 24,
		heat_point = -5,
	})

	-- Cold Taiga
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 58,
		heat_point = 8,
	})

	-- A cold beach-like biome, implemented as low part of Cold Taiga
	minetest.register_biome({
		name = "ColdTaiga_beach",
		node_dust = "mcl_core:snow",
		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,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = 1,
		y_max = 2,
		humidity_point = 58,
		heat_point = 8,
	})
	-- Water part of the beach. Added to prevent snow being on the ice.
	minetest.register_biome({
		name = "ColdTaiga_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,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = -3,
		y_max = 0,
		humidity_point = 58,
		heat_point = 8,
	})
	minetest.register_biome({
		name = "ColdTaiga_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = -4,
		humidity_point = 58,
		heat_point = 8,
	})

	-- Mega Taiga
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 76,
		heat_point = 10,
	})
	minetest.register_biome({
		name = "MegaTaiga_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 76,
		heat_point = 10,
	})

	-- Mega Spruce Taiga
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 100,
		heat_point = 8,
	})
	minetest.register_biome({
		name = "MegaSpruceTaiga_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 100,
		heat_point = 8,
	})

	-- Extreme Hills
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 10,
		heat_point = 45,
	})
	minetest.register_biome({
		name = "ExtremeHills_beach",
		node_top = "mcl_core:sand",
		depth_top = 2,
		depth_water_top = 1,
		node_filler = "mcl_core:sandstone",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 4,
		y_min = -3,
		y_max = 3,
		humidity_point = 10,
		heat_point = 45,
	})
	minetest.register_biome({
		name = "ExtremeHills_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 4,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 4,
		y_min = OCEAN_MIN,
		y_max = -4,
		humidity_point = 10,
		heat_point = 45,
	})

	-- Extreme Hills M
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 0,
		heat_point = 25,
	})
	minetest.register_biome({
		name = "ExtremeHillsM_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 3,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 0,
		heat_point = 25,
	})

	-- Extreme Hills+
	-- This biome is identical to Extreme Hills on the surface but has snow-covered mountains with spruce/oak
	-- Forests above a certain height.
	minetest.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 = 44,
		humidity_point = 24,
		heat_point = 25,
	})
	---- Sub-biome for Extreme Hills+ for those snow Forests
	minetest.register_biome({
		name = "ExtremeHills+_snowtop",
		node_dust = "mcl_core:snow",
		node_top = "mcl_core:dirt_with_grass_snow",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 4,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 4,
		y_min = 45,
		y_max = mcl_vars.mg_overworld_max,
		humidity_point = 24,
		heat_point = 25,
	})
	minetest.register_biome({
		name = "ExtremeHills+_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 4,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 4,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 24,
		heat_point = 25,
	})

	-- Stone beach
	-- TODO: Should occour only at real beaches.
	minetest.register_biome({
		name = "StoneBeach",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		filler_depth = 2,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 1,
		y_min = -6,
		y_max = mcl_vars.mg_overworld_max,
		humidity_point = 0,
		heat_point = 8,
	})

	minetest.register_biome({
		name = "StoneBeach_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		filler_depth = 2,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 1,
		y_min = OCEAN_MIN,
		y_max = -7,
		humidity_point = 0,
		heat_point = 8,
	})

	-- Ice Plains
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 24,
		heat_point = 8,
	})
	minetest.register_biome({
		name = "IcePlains_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 24,
		heat_point = 8,
	})

	-- Plains
	minetest.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 = 4,
		y_max = mcl_vars.mg_overworld_max,
		humidity_point = 39,
		heat_point = 58,
	})
	minetest.register_biome({
		name = "Plains_beach",
		node_top = "mcl_core:sand",
		depth_top = 2,
		node_filler = "mcl_core:sandstone",
		depth_filler = 2,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = 3,
		y_max = 1,
		humidity_point = 39,
		heat_point = 58,
	})
	minetest.register_biome({
		name = "Plains_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 39,
		heat_point = 58,
	})

	-- Sunflower Plains
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 28,
		heat_point = 45,
	})
	minetest.register_biome({
		name = "SunflowerPlains_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:dirt",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 28,
		heat_point = 45,
	})

	-- Taiga
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 58,
		heat_point = 22,
	})
	minetest.register_biome({
		name = "Taiga_beach",
		node_top = "mcl_core:sand",
		depth_top = 2,
		node_filler = "mcl_core:sandstone",
		depth_filler = 1,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = 1,
		y_max = 3,
		humidity_point = 58,
		heat_point = 22,
	})
	minetest.register_biome({
		name = "Taiga_ocean",
		node_top = "mcl_core:sand",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 58,
		heat_point = 22,
	})

	-- Forest
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 61,
		heat_point = 45,
	})
	minetest.register_biome({
		name = "Forest_beach",
		node_top = "mcl_core:sand",
		depth_top = 2,
		node_filler = "mcl_core:sandstone",
		depth_filler = 1,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = -1,
		y_max = 0,
		humidity_point = 61,
		heat_point = 45,
	})
	minetest.register_biome({
		name = "Forest_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = -2,
		humidity_point = 61,
		heat_point = 45,
	})

	-- Flower Forest
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 44,
		heat_point = 32,
	})
	minetest.register_biome({
		name = "FlowerForest_beach",
		node_top = "mcl_core:sand",
		depth_top = 2,
		node_filler = "mcl_core:sandstone",
		depth_filler = 1,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = -2,
		y_max = 2,
		humidity_point = 44,
		heat_point = 32,
	})
	minetest.register_biome({
		name = "FlowerForest_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = -3,
		humidity_point = 44,
		heat_point = 32,
	})

	-- Birch Forest
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 78,
		heat_point = 31,
	})
	minetest.register_biome({
		name = "BirchForest_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 78,
		heat_point = 31,
	})

	-- Birch Forest M
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 77,
		heat_point = 27,
	})
	minetest.register_biome({
		name = "BirchForestM_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 77,
		heat_point = 27,
	})

	-- Desert
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 26,
		heat_point = 94,
	})
	minetest.register_biome({
		name = "Desert_ocean",
		node_top = "mcl_core:sand",
		depth_top = 1,
		node_filler = "mcl_core:sand",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 26,
		heat_point = 94,
	})

	-- Roofed Forest
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 94,
		heat_point = 27,
	})
	minetest.register_biome({
		name = "RoofedForest_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 2,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 94,
		heat_point = 27,
	})

	-- Mesa
	minetest.register_biome({
		name = "Mesa",
		node_top = "mcl_colorblocks:hardened_clay",
		depth_top = 1,
		node_filler = "mcl_colorblocks:hardened_clay",
		node_stone = "mcl_colorblocks:hardened_clay",
		y_min = 11,
		y_max = mcl_vars.mg_overworld_max,
		humidity_point = 0,
		heat_point = 100,
	})
	-- Helper biome for the red sand at the bottom of Mesas.
	minetest.register_biome({
		name = "Mesa_sandlevel",
		node_top = "mcl_core:redsand",
		depth_top = 1,
		node_filler = "mcl_colorblocks:hardened_clay_orange",
		depth_filler = 3,
		node_riverbed = "mcl_core:redsand",
		depth_riverbed = 1,
		node_stone = "mcl_colorblocks:hardened_clay_orange",
		y_min = -3,
		y_max = 10,
		humidity_point = 0,
		heat_point = 100,
	})
	minetest.register_biome({
		name = "Mesa_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_min = OCEAN_MIN,
		y_max = -4,
		humidity_point = 0,
		heat_point = 100,
	})

	-- Mesa Plateau F
	-- Identical to Mesa below Y=30. At Y=30 and above there is an oak forest
	minetest.register_biome({
		name = "MesaPlateauF",
		node_top = "mcl_colorblocks:hardened_clay",
		depth_top = 1,
		node_filler = "mcl_colorblocks:hardened_clay",
		node_stone = "mcl_colorblocks:hardened_clay",
		y_min = 11,
		y_max = 29,
		humidity_point = 0,
		heat_point = 60,
	})

	-- The actual plateau of this biome
	-- This is a plateau for grass blocks, tall grass, coarse dirt and oaks.
	minetest.register_biome({
		name = "MesaPlateauF_grasstop",
		node_top = "mcl_core:dirt_with_grass",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		filler_depth = 1,
		node_stone = "mcl_colorblocks:hardened_clay",
		y_min = 30,
		y_max = mcl_vars.mg_overworld_max,
		humidity_point = 0,
		heat_point = 60,
	})

	-- Helper biome for the red sand at the bottom.
	minetest.register_biome({
		name = "MesaPlateauF_sandlevel",
		node_top = "mcl_core:redsand",
		depth_top = 1,
		node_filler = "mcl_colorblocks:hardened_clay_orange",
		depth_filler = 3,
		node_riverbed = "mcl_core:redsand",
		depth_riverbed = 1,
		node_stone = "mcl_colorblocks:hardened_clay_orange",
		y_min = -3,
		y_max = 10,
		humidity_point = 0,
		heat_point = 60,
	})
	minetest.register_biome({
		name = "MesaPlateauF_ocean",
		node_top = "mcl_core:sand",
		depth_top = 3,
		node_filler = "mcl_colorblocks:sand",
		depth_filler = 2,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = -4,
		humidity_point = 0,
		heat_point = 60,
	})

	-- Savanna
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 36,
		heat_point = 79,
	})
	minetest.register_biome({
		name = "Savanna_beach",
		node_top = "mcl_core:sand",
		depth_top = 3,
		node_filler = "mcl_core:sandstone",
		depth_filler = 2,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = -1,
		y_max = 0,
		humidity_point = 36,
		heat_point = 79,
	})
	minetest.register_biome({
		name = "Savanna_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = -2,
		humidity_point = 36,
		heat_point = 79,
	})

	-- Savanna M
	-- Changes to Savanna: Coarse Dirt. No sand beach. No oaks.
	-- Otherwise identical to Savanna
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 48,
		heat_point = 100,
	})
	minetest.register_biome({
		name = "SavannaM_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 48,
		heat_point = 100,
	})

	-- Jungle
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 88,
		heat_point = 81,
	})
	minetest.register_biome({
		name = "Jungle_shore",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = -1,
		y_max = 0,
		humidity_point = 88,
		heat_point = 81,
	})
	minetest.register_biome({
		name = "Jungle_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = -2,
		humidity_point = 88,
		heat_point = 81,
	})

	-- Jungle M
	-- Like Jungle but with even more dense vegetation
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 92,
		heat_point = 81,
	})
	minetest.register_biome({
		name = "JungleM_shore",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = -1,
		y_max = 0,
		humidity_point = 92,
		heat_point = 81,
	})
	minetest.register_biome({
		name = "JungleM_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = -2,
		humidity_point = 92,
		heat_point = 81,
	})

	-- Jungle Edge
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 88,
		heat_point = 76,
	})
	minetest.register_biome({
		name = "JungleEdge_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 2,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 88,
		heat_point = 76,
	})

	-- 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.
	minetest.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 = mcl_vars.mg_overworld_max,
		humidity_point = 90,
		heat_point = 79,
	})
	minetest.register_biome({
		name = "JungleEdgeM_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 4,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 90,
		heat_point = 79,
	})

	-- Swampland
	minetest.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,
		-- Note: Limited in height!
		y_max = 23,
		humidity_point = 90,
		heat_point = 50,
	})
	minetest.register_biome({
		name = "Swampland_shore",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = -4,
		y_max = 0,
		humidity_point = 90,
		heat_point = 50,
	})
	minetest.register_biome({
		name = "Swampland_ocean",
		node_top = "mcl_core:sand",
		depth_top = 1,
		node_filler = "mcl_core:sand",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = -5,
		humidity_point = 90,
		heat_point = 50,
	})

	-- Mushroom Island / Mushroom Island Shore (rare)
	-- TODO: Make sure these biomes only spawn in islands
	minetest.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 = 4,
		-- Note: Limited in height!
		y_max = 20,
		humidity_point = 106,
		heat_point = 50,
	})

	minetest.register_biome({
		name = "MushroomIslandShore",
		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,
		y_max = 3,
		humidity_point = 106,
		heat_point = 50,
	})
	minetest.register_biome({
		name = "MushroomIsland_ocean",
		node_top = "mcl_core:dirt",
		depth_top = 1,
		node_filler = "mcl_core:dirt",
		depth_filler = 3,
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 2,
		y_min = OCEAN_MIN,
		y_max = 0,
		humidity_point = 106,
		heat_point = 50,
	})

	-- Deep Ocean
	-- Special biome below all other ocean biomes, used for generating gravel
	minetest.register_biome({
		name = "DeepOcean",
		node_top = "mcl_core:gravel",
		depth_top = 2,
		node_filler = "mcl_core:gravel",
		depth_filler = 2,
		node_riverbed = "mcl_core:gravel",
		depth_riverbed = 2,
		y_min = DEEP_OCEAN_MIN,
		y_max = DEEP_OCEAN_MAX,
		heat_point = 50,
		humidity_point = 50,
	})

	-- Underground biome, to prevent ocean floor materials “leaking” into the underground.
	minetest.register_biome({
		name = "underground",
		y_min = mcl_vars.mg_overworld_min,
		y_max = DEEP_OCEAN_MIN-1,
		heat_point = 50,
		humidity_point = 50,
	})
end

-- Register biomes of non-Overworld biomes
local function register_dimension_biomes()
	--[[ REALMS ]]

	--[[ THE NETHER ]]
	minetest.register_biome({
		name = "Nether",
		node_filler = "mcl_nether:netherrack",
		node_stone = "mcl_nether:netherrack",
		node_water = "air",
		node_river_water = "air",
		y_min = mcl_vars.mg_nether_min,
		-- FIXME: For some reason the Nether stops generating early if this constant is not added.
		-- Figure out why.
		y_max = mcl_vars.mg_nether_max + 80,
		heat_point = 100,
		humidity_point = 0,
	})

	--[[ THE END ]]
	minetest.register_biome({
		name = "End",
		node_stone = "air",
		node_filler = "air",
		node_water = "air",
		node_river_water = "air",
		-- FIXME: For some reason the End stops generating early if this constant is not added.
		-- Figure out why.
		y_min = mcl_vars.mg_end_min,
		y_max = mcl_vars.mg_end_max + 80,
		heat_point = 50,
		humidity_point = 50,
	})

end

-- Register “fake” ores directly related to the biomes
local function register_biomelike_ores()

	-- Random coarse dirt floor in Mega Taiga and Mesa Plateau F
	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		= mcl_vars.mg_overworld_min,
		y_max		= mcl_vars.mg_overworld_max,
		noise_threshold = 0.2,
		noise_params = {offset=0, scale=15, spread={x=130, y=130, z=130}, seed=24, octaves=3, persist=0.70},
		biomes = { "MegaTaiga" },
	})

	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		= mcl_vars.mg_overworld_min,
		y_max		= mcl_vars.mg_overworld_max,
		noise_threshold = 0.0,
		noise_params = {offset=0, scale=15, spread={x=250, y=250, z=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		= mcl_vars.mg_overworld_min,
		y_max		= mcl_vars.mg_overworld_max,
		biomes = { "MesaPlateauF_grasstop" },
	})

	-- 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		= mcl_vars.mg_overworld_min,
		y_max		= mcl_vars.mg_overworld_max,
		noise_threshold = 0.2,
		noise_params = {offset=0, scale=5, spread={x=250, y=250, z=250}, seed=64, octaves=3, persist=0.60},
		biomes = { "ExtremeHillsM" },
	})

	-- Mesa strata (registered as sheet ores)

	-- Helper function
	-- Colors to use: silver (light grey), brown, orange, red, yellow, white
	local stratum = function(y_min, height, color, seed)
		if not height then
			height = 1
		end
		if not seed then
			seed = 39
		end
		local y_max = y_min + height-1
		minetest.register_ore({
			ore_type = "sheet",
			ore = "mcl_colorblocks:hardened_clay_"..color,
			wherein = {"mcl_colorblocks:hardened_clay"},
			column_height_min = height,
			column_height_max = height,
			y_min = y_min,
			y_max = y_max,
			noise_threshold = -1.0,
			noise_params = {offset=0, scale=1, spread={x=3100, y=3100, z=3100}, seed=seed, octaves=3, persist=0.70},
			biomes = { "Mesa", "MesaPlateauF" },
		})
	end

	stratum(11, 3, "orange")

	-- Create strata for up to Y = 256
	-- This is semi-random based on the mapseed.
	local seed = minetest.get_mapgen_setting("seed")
	local i = 0
	repeat
		seed = seed + i

		stratum(17+i, 1, "orange", seed)
		stratum(19+i, 1, "silver", seed)
		stratum(21+i, 1, "brown", seed)
		stratum(22+i, 1, "red", seed)
		stratum(24+i, 1, "silver", seed)
		stratum(26+i, 1, "brown", seed)
		stratum(27+i, 1, "white", seed)
		stratum(29+i, 1, "orange", seed)
		stratum(34+i, 1, "red", seed)
		stratum(42+i, 1, "orange", seed)
		stratum(44+i, 1, "yellow", seed)
		stratum(46+i, 1, "brown", seed)
		stratum(48+i, 1, "silver", seed)
		stratum(51+i, 1, "white", seed)
		stratum(55+i, 2, "yellow", seed)
		stratum(58+i, 2, "orange", seed)
		stratum(62+i, 1, "brown", seed)
		stratum(68+i, 3, "orange", seed)
		stratum(73+i, 2, "brown", seed)
		stratum(76+i, 1, "white", seed)
		-- Repeat strata above Y=76

		i = i + 66
	until i > 256
end

-- Non-Overworld ores
local function register_dimension_ores()

	--[[ NETHER GENERATION ]]

	-- 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           = mcl_vars.mg_nether_min,
		y_max           = mcl_util.layer_to_y(64, "nether"),
		noise_threshold = 0.0,
		noise_params    = {
			offset = 0.5,
			scale = 0.1,
			spread = {x = 5, y = 5, z = 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_util.layer_to_y(23, "nether"),
		y_max          = mcl_util.layer_to_y(37, "nether"),
	})
	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_util.layer_to_y(23, "nether"),
		y_max          = mcl_util.layer_to_y(37, "nether"),
	})

	-- 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           = mcl_vars.mg_lava_nether_max + 10,
		y_max           = mcl_vars.mg_nether_max,
		noise_threshold = 0.0,
		noise_params    = {
			offset = 0.5,
			scale = 0.1,
			spread = {x = 5, y = 5, z = 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_util.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_util.layer_to_y(65+2, "nether"),
		noise_threshold = 0.2,
		noise_params    = {
			offset = 0.0,
			scale = 0.5,
			spread = {x = 20, y = 20, z = 20},
			seed = 766,
			octaves = 3,
			persist = 0.6,
		},
	})

	-- Nether quartz
	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 = mcl_vars.mg_nether_min,
		y_max = mcl_vars.mg_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 = mcl_vars.mg_nether_min,
		y_max = mcl_vars.mg_nether_max,
	})

	-- 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 = 500,
		clust_num_ores = 1,
		clust_size     = 1,
		y_min           = mcl_vars.mg_nether_min,
		y_max           = mcl_vars.mg_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,
		y_min           = mcl_vars.mg_lava_nether_max + 2,
		y_max           = mcl_vars.mg_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,
		y_min           = mcl_vars.mg_lava_nether_max + 13,
		y_max           = mcl_vars.mg_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,
		y_min           = mcl_vars.mg_lava_nether_max + 49,
		y_max           = mcl_vars.mg_nether_max,
	})

	--[[ THE END ]]

	-- Generate fake End
	-- TODO: Remove both "ores" when there's a better End generator

	minetest.register_ore({
		ore_type        = "sheet",
		ore             = "mcl_end:end_stone",
		wherein         = {"air"},
		y_min           = mcl_vars.mg_end_min+64,
		y_max           = mcl_vars.mg_end_min+80,
		column_height_min = 6,
		column_height_max = 7,
		column_midpoint_factor = 0.0,
		noise_params = {
			offset  = -2,
			scale   = 8,
			spread  = {x=100, y=100, z=100},
			seed    = 2999,
			octaves = 5,
			persist = 0.55,
		},
		noise_threshold = 0,
	})

	minetest.register_ore({
		ore_type        = "sheet",
		ore             = "mcl_end:end_stone",
		wherein         = {"air"},
		y_min           = mcl_vars.mg_end_min+64,
		y_max           = mcl_vars.mg_end_min+80,
		column_height_min = 4,
		column_height_max = 4,
		column_midpoint_factor = 0.0,
		noise_params = {
			offset  = -4,
			scale   = 3,
			spread  = {x=200, y=200, z=200},
			seed    = 5390,
			octaves = 5,
			persist = 0.6,
		},
		noise_threshold = 0,
	})

end


-- All mapgens except mgv6

-- Template to register a grass or fern decoration
local function register_grass_decoration(grasstype, offset, scale, biomes)
	local place_on, seed, node
	if grasstype == "fern" then
		node = "mcl_flowers:fern"
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:podzol"}
		seed = 333
	elseif grasstype == "tallgrass" then
		node = "mcl_flowers:tallgrass"
		place_on = {"mcl_core:dirt_with_grass"}
		seed = 420
	end
	local noise = {
		offset = offset,
		scale = scale,
		spread = {x = 200, y = 200, z = 200},
		seed = seed,
		octaves = 3,
		persist = 0.6
	}
	minetest.register_decoration({
		deco_type = "simple",
		place_on = place_on,
		sidelen = 16,
		noise_params = noise,
		biomes = biomes,
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		decoration = node,
	})
end

local function register_decorations()
	-- Large ice spike
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:snowblock", "mcl_core:snow", "mcl_core:dirt_with_grass_snow"},
		sidelen = 80,
		noise_params = {
			offset = 0.00040,
			scale = 0.001,
			spread = {x = 250, y = 250, z = 250},
			seed = 1133,
			octaves = 4,
			persist = 0.67,
		},
		biomes = {"IcePlainsSpikes"},
		y_min = 4,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_structures").."/schematics/mcl_structures_ice_spike_large.mts",
		rotation = "random",
		flags = "place_center_x, place_center_z",
	})

	-- Small ice spike
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:snowblock", "mcl_core:snow", "mcl_core:dirt_with_grass_snow"},
		sidelen = 80,
		noise_params = {
			offset = 0.005,
			scale = 0.001,
			spread = {x = 250, y = 250, z = 250},
			seed = 1133,
			octaves = 4,
			persist = 0.67,
		},
		biomes = {"IcePlainsSpikes"},
		y_min = 4,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_structures").."/schematics/mcl_structures_ice_spike_small.mts",
		rotation = "random",
		flags = "place_center_x, place_center_z",
	})

	-- Oak
	-- Large oaks
	for i=1, 2 do
		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
			sidelen = 80,
			noise_params = {
				offset = 0.00075,
				scale = 0.0011,
				spread = {x = 250, y = 250, z = 250},
				seed = 3,
				octaves = 3,
				persist = 0.66
			},
			biomes = {"Forest"},
			y_min = 1,
			y_max = mcl_vars.mg_overworld_max,
			schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_large_"..i..".mts",
			flags = "place_center_x, place_center_z",
			rotation = "random",
		})

		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt", "mcl_core:dirt_with_grass_snow"},
			sidelen = 80,
			noise_params = {
				offset = -0.0004,
				scale = 0.001,
				spread = {x = 250, y = 250, z = 250},
				seed = 3,
				octaves = 3,
				persist = 0.6
			},
			biomes = {"ExtremeHills", "ExtremeHillsM", "ExtremeHills+", "ExtremeHills+_snowtop"},
			y_min = 1,
			y_max = mcl_vars.mg_overworld_max,
			schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_large_"..i..".mts",
			flags = "place_center_x, place_center_z",
			rotation = "random",
		})
	end
	-- Small “classic” oak (many biomes)
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 16,
		noise_params = {
			offset = 0.025,
			scale = 0.0022,
			spread = {x = 250, y = 250, z = 250},
			seed = 2,
			octaves = 3,
			persist = 0.66
		},
		biomes = {"Forest"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_classic.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 16,
		noise_params = {
			offset = 0.01,
			scale = 0.0022,
			spread = {x = 250, y = 250, z = 250},
			seed = 2,
			octaves = 3,
			persist = 0.66
		},
		biomes = {"FlowerForest"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_classic.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt", "mcl_core:dirt_with_grass_snow"},
		sidelen = 16,
		noise_params = {
			offset = 0.0,
			scale = 0.002,
			spread = {x = 250, y = 250, z = 250},
			seed = 2,
			octaves = 3,
			persist = 0.7
		},
		biomes = {"ExtremeHills", "ExtremeHillsM", "ExtremeHills+", "ExtremeHills+_snowtop"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_classic.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})

	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt_with_grass_snow", "mcl_core:dirt"},
		sidelen = 16,
		noise_params = {
			offset = 0.006,
			scale = 0.002,
			spread = {x = 250, y = 250, z = 250},
			seed = 2,
			octaves = 3,
			persist = 0.7
		},
		biomes = {"ExtremeHills+", "ExtremeHills+_snowtop"},
		y_min = 50,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_classic.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.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 = {x = 250, y = 250, z = 250},
			seed = 2,
			octaves = 3,
			persist = 0.7
		},
		biomes = {"MesaPlateauF_grasstop"},
		y_min = 30,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_classic.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})

	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt", "mcl_core:dirt_with_grass_snow"},
		sidelen = 16,
		noise_params = {
			offset = 0.0,
			scale = 0.0002,
			spread = {x = 250, y = 250, z = 250},
			seed = 2,
			octaves = 3,
			persist = 0.7
		},
		biomes = {"IcePlains"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_classic.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 80,
		fill_ratio = 0.004,
		biomes = {"Jungle", "JungleM"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_classic.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 80,
		fill_ratio = 0.0004,
		biomes = {"JungleEdge", "JungleEdgeM", "Savanna"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_classic.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})


	-- Rare balloon oak
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 16,
		noise_params = {
			offset = 0.002083,
			scale = 0.0022,
			spread = {x = 250, y = 250, z = 250},
			seed = 3,
			octaves = 3,
			persist = 0.6,
		},
		biomes = {"Forest"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_balloon.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	-- Swamp oak
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 80,
		noise_params = {
			offset = 0.0055,
			scale = 0.0011,
			spread = {x = 250, y = 250, z = 250},
			seed = 5005,
			octaves = 5,
			persist = 0.6,
		},
		biomes = {"Swampland", "Swampland_shore"},
		y_min = 0,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_oak_swamp.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})

	-- Jungle tree

	-- Huge jungle tree (2 variants)
	for i=1, 2 do
		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
			sidelen = 80,
			fill_ratio = 0.00125,
			biomes = {"Jungle"},
			y_min = 4,
			y_max = mcl_vars.mg_overworld_max,
			schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_jungle_tree_huge_"..i..".mts",
			flags = "place_center_x, place_center_z",
			rotation = "random",
		})
		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
			sidelen = 80,
			fill_ratio = 0.004,
			biomes = {"JungleM"},
			y_min = 4,
			y_max = mcl_vars.mg_overworld_max,
			schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_jungle_tree_huge_"..i..".mts",
			flags = "place_center_x, place_center_z",
			rotation = "random",
		})
	end

	-- Common jungle tree
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 80,
		fill_ratio = 0.045,
		biomes = {"Jungle"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_jungle_tree.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 80,
		fill_ratio = 0.0045,
		biomes = {"JungleEdge", "JungleEdgeM"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_jungle_tree.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})

	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 80,
		fill_ratio = 0.09,
		biomes = {"JungleM"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_jungle_tree.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})

	-- Spruce
	local function quick_spruce(seed, offset, sprucename, biomes, y)
		if not y then
			y = 2
		end
		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass_snow", "mcl_core:dirt_with_grass", "mcl_core:dirt", "mcl_core:podzol"},
			sidelen = 16,
			noise_params = {
				offset = offset,
				scale = 0.0006,
				spread = {x = 250, y = 250, z = 250},
				seed = seed,
				octaves = 3,
				persist = 0.66
			},
			biomes = biomes,
			y_min = y,
			y_max = mcl_vars.mg_overworld_max,
			schematic = minetest.get_modpath("mcl_core").."/schematics/"..sprucename,
			flags = "place_center_x, place_center_z",
		})
	end

	-- Huge spruce
	quick_spruce(3000, 0.005, "mcl_core_spruce_huge_1.mts", {"MegaSpruceTaiga"})
	quick_spruce(4000, 0.005, "mcl_core_spruce_huge_2.mts", {"MegaSpruceTaiga"})
	quick_spruce(6000, 0.005, "mcl_core_spruce_huge_3.mts", {"MegaSpruceTaiga"})

	quick_spruce(3000, 0.0008, "mcl_core_spruce_huge_up_1.mts", {"MegaTaiga"})
	quick_spruce(4000, 0.0008, "mcl_core_spruce_huge_up_2.mts", {"MegaTaiga"})
	quick_spruce(6000, 0.0008, "mcl_core_spruce_huge_up_3.mts", {"MegaTaiga"})


	-- Common spruce
	quick_spruce(11000, 0.00150, "mcl_core_spruce_5.mts", {"Taiga", "ColdTaiga"})

	quick_spruce(2500, 0.00325, "mcl_core_spruce_1.mts", {"MegaSpruceTaiga", "MegaTaiga", "Taiga", "ColdTaiga"})
	quick_spruce(7000, 0.00425, "mcl_core_spruce_3.mts", {"MegaSpruceTaiga", "MegaTaiga", "Taiga", "ColdTaiga"})
	quick_spruce(9000, 0.00325, "mcl_core_spruce_4.mts", {"MegaTaiga", "Taiga", "ColdTaiga"})

	quick_spruce(9500, 0.00500, "mcl_core_spruce_tall.mts", {"MegaTaiga"})

	quick_spruce(5000, 0.00250, "mcl_core_spruce_2.mts", {"MegaSpruceTaiga", "MegaTaiga"})

	quick_spruce(11000, 0.000025, "mcl_core_spruce_5.mts", {"ExtremeHills", "ExtremeHillsM"})
	quick_spruce(2500, 0.00005, "mcl_core_spruce_1.mts", {"ExtremeHills", "ExtremeHillsM"})
	quick_spruce(7000, 0.00005, "mcl_core_spruce_3.mts", {"ExtremeHills", "ExtremeHillsM"})
	quick_spruce(9000, 0.00005, "mcl_core_spruce_4.mts", {"ExtremeHills", "ExtremeHillsM"})

	quick_spruce(11000, 0.001, "mcl_core_spruce_5.mts", {"ExtremeHills+", "ExtremeHills+_snowtop"}, 50)
	quick_spruce(2500, 0.002, "mcl_core_spruce_1.mts", {"ExtremeHills+", "ExtremeHills+_snowtop"}, 50)
	quick_spruce(7000, 0.003, "mcl_core_spruce_3.mts", {"ExtremeHills+", "ExtremeHills+_snowtop"}, 50)
	quick_spruce(9000, 0.002, "mcl_core_spruce_4.mts", {"ExtremeHills+", "ExtremeHills+_snowtop"}, 50)


	-- Small lollipop spruce
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass_snow", "mcl_core:dirt_with_grass", "mcl_core:podzol"},
		sidelen = 16,
		noise_params = {
			offset = 0.004,
			scale = 0.0022,
			spread = {x = 250, y = 250, z = 250},
			seed = 2500,
			octaves = 3,
			persist = 0.66
		},
		biomes = {"Taiga", "ColdTaiga"},
		y_min = 2,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_spruce_lollipop.mts",
		flags = "place_center_x, place_center_z",
	})

	-- Matchstick spruce: Very few leaves, tall trunk
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass_snow", "mcl_core:dirt_with_grass", "mcl_core:podzol"},
		sidelen = 80,
		noise_params = {
			offset = -0.025,
			scale = 0.025,
			spread = {x = 250, y = 250, z = 250},
			seed = 2566,
			octaves = 5,
			persist = 0.60,
		},
		biomes = {"Taiga", "ColdTaiga"},
		y_min = 3,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_spruce_matchstick.mts",
		flags = "place_center_x, place_center_z",
	})

	-- Rare spruce in Ice Plains
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt_with_grass_snow"},
		sidelen = 16,
		noise_params = {
			offset = -0.00075,
			scale = -0.0015,
			spread = {x = 250, y = 250, z = 250},
			seed = 11,
			octaves = 3,
			persist = 0.7
		},
		biomes = {"IcePlains"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_spruce_5.mts",
		flags = "place_center_x, place_center_z",
	})

	-- Acacia (many variants)
	for a=1, 7 do
		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass", "mcl_core:coarse_dirt"},
			sidelen = 16,
			fill_ratio = 0.0002,
			biomes = {"Savanna", "SavannaM"},
			y_min = 1,
			y_max = mcl_vars.mg_overworld_max,
			schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_acacia_"..a..".mts",
			flags = "place_center_x, place_center_z",
			rotation = "random",
		})
	end

	-- Birch
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass"},
		sidelen = 16,
		noise_params = {
			offset = 0.03,
			scale = 0.0025,
			spread = {x = 250, y = 250, z = 250},
			seed = 11,
			octaves = 3,
			persist = 0.66
		},
		biomes = {"BirchForest"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_birch.mts",
		flags = "place_center_x, place_center_z",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass"},
		sidelen = 16,
		noise_params = {
			offset = 0.03,
			scale = 0.0025,
			spread = {x = 250, y = 250, z = 250},
			seed = 11,
			octaves = 3,
			persist = 0.66
		},
		biomes = {"BirchForestM"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_birch_tall.mts",
		flags = "place_center_x, place_center_z",
	})

	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 16,
		noise_params = {
			offset = 0.000333,
			scale = -0.0015,
			spread = {x = 250, y = 250, z = 250},
			seed = 11,
			octaves = 3,
			persist = 0.66
		},
		biomes = {"Forest", "FlowerForest"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_core").."/schematics/mcl_core_birch.mts",
		flags = "place_center_x, place_center_z",
	})

	-- Dark Oak
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass"},
		sidelen = 16,
		noise_params = {
			offset = 0.05,
			scale = 0.0015,
			spread = {x = 125, y = 125, z = 125},
			seed = 223,
			octaves = 3,
			persist = 0.66
		},
		biomes = {"RoofedForest"},
		y_min = 4,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("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)
	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)

	-- Huge Brown Mushroom
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = { "mcl_core:dirt_with_grass", "mcl_core:dirt" },
		sidelen = 80,
		fill_ratio = ratio_mushroom_huge,
		biomes = { "RoofedForest" },
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_mushrooms").."/schematics/mcl_mushrooms_huge_brown.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = { "mcl_core:dirt_with_grass", "mcl_core:dirt" },
		sidelen = 80,
		fill_ratio = ratio_mushroom_giant,
		biomes = { "RoofedForest" },
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_mushrooms").."/schematics/mcl_mushrooms_giant_brown.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})

	minetest.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 = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_mushrooms").."/schematics/mcl_mushrooms_huge_brown.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.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 = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_mushrooms").."/schematics/mcl_mushrooms_giant_brown.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})

	-- Huge Red Mushroom
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = { "mcl_core:dirt_with_grass", "mcl_core:dirt" },
		sidelen = 80,
		fill_ratio = ratio_mushroom_huge,
		biomes = { "RoofedForest" },
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_mushrooms").."/schematics/mcl_mushrooms_huge_red.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = { "mcl_core:dirt_with_grass", "mcl_core:dirt" },
		sidelen = 80,
		fill_ratio = ratio_mushroom_giant,
		biomes = { "RoofedForest" },
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_mushrooms").."/schematics/mcl_mushrooms_giant_red.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})

	minetest.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 = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_mushrooms").."/schematics/mcl_mushrooms_huge_red.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})
	minetest.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 = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_mushrooms").."/schematics/mcl_mushrooms_giant_red.mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
	})

	-- Moss stone boulder (3×3)
	minetest.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 = {x = 300, y = 300, z = 300},
			seed = 775703,
			octaves = 4,
			persist = 0.63,
		},
		biomes = {"MegaTaiga", "MegaSpruceTaiga"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_structures").."/schematics/mcl_structures_boulder.mts",
		flags = "place_center_x, place_center_z",
	})

	-- Small moss stone boulder (2×2)
	minetest.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 = {x = 300, y = 300, z = 300},
			seed = 775703,
			octaves = 4,
			persist = 0.63,
		},
		biomes = {"MegaTaiga", "MegaSpruceTaiga"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = minetest.get_modpath("mcl_structures").."/schematics/mcl_structures_boulder_small.mts",
		flags = "place_center_x, place_center_z",
	})

	-- Cacti
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"group:sand"},
		sidelen = 16,
		noise_params = {
			offset = -0.012,
			scale = 0.024,
			spread = {x = 100, y = 100, z = 100},
			seed = 257,
			octaves = 3,
			persist = 0.6
		},
		y_min = 4,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_core:cactus",
		biomes = {"Desert","Mesa","Mesa_sandlevel","MesaPlateauF","MesaPlateauF_sandlevel"},
		height = 1,
		height_max = 3,
	})

	-- Sugar canes
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"mcl_core:dirt", "mcl_core:coarse_dirt", "mcl_core:dirt_with_grass", "group:sand", "mcl_core:podzol", "mcl_core:reeds"},
		sidelen = 16,
		noise_params = {
			offset = -0.3,
			scale = 0.7,
			spread = {x = 100, y = 100, z = 100},
			seed = 2,
			octaves = 3,
			persist = 0.7
		},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_core:reeds",
		height = 1,
		height_max = 3,
		spawn_by = { "mcl_core:water_source", "group:frosted_ice" },
		num_spawn_by = 1,
	})
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"mcl_core:dirt", "mcl_core:coarse_dirt", "mcl_core:dirt_with_grass", "group:sand", "mcl_core:podzol", "mcl_core:reeds"},
		sidelen = 16,
		noise_params = {
			offset = 0.0,
			scale = 0.5,
			spread = {x = 100, y = 100, z = 100},
			seed = 2,
			octaves = 3,
			persist = 0.7,
		},
		biomes = {"Swampland"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_core:reeds",
		height = 1,
		height_max = 3,
		spawn_by = { "mcl_core:water_source", "group:frosted_ice" },
		num_spawn_by = 1,
	})

	-- Doubletall grass
	minetest.register_decoration({
		deco_type = "schematic",
		schematic = {
			size = { x=1, y=3, z=1 },
			data = {
				{ name = "air", prob = 0 },
				{ name = "mcl_flowers:double_grass", param1=255, },
				{ name = "mcl_flowers:double_grass_top", param1=255, },
			},
		},
		replacements = {
			["mcl_flowers:tallgrass"] = "mcl_flowers:double_grass"
		},
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt_with_grass_snow"},
		sidelen = 16,
		noise_params = {
			offset = -0.01,
			scale = 0.03,
			spread = {x = 300, y = 300, z = 300},
			seed = 420,
			octaves = 2,
			persist = 0.6,
		},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		biomes = {"Plains", "SunflowerPlains", "Taiga", "Forest", "FlowerForest", "BirchForest", "BirchForestM", "RoofedForest", "Savanna", "SavannaM", "MesaPlateauF_grasstop" },
	})

	-- Large ferns
	minetest.register_decoration({
		deco_type = "schematic",
		schematic = {
			size = { x=1, y=3, z=1 },
			data = {
				{ name = "air", prob = 0 },
				{ name = "mcl_flowers:double_fern", param1=255, },
				{ name = "mcl_flowers:double_fern_top", param1=255, },
			},
		},
		replacements = {
			["mcl_flowers:fern"] = "mcl_flowers:double_fern"
		},
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:podzol", "mcl_core:podzol_snow"},

		sidelen = 16,
		noise_params = {
			offset = 0.01,
			scale = 0.03,
			spread = {x = 250, y = 250, z = 250},
			seed = 333,
			octaves = 2,
			persist = 0.66,
		},
		biomes = { "Jungle", "JungleM", "JungleEdge", "JungleEdgeM", "Taiga", "ColdTaiga", "MegaTaiga", "MegaSpruceTaiga" },
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
	})

	minetest.register_decoration({
		deco_type = "schematic",
		schematic = {
			size = { x=1, y=3, z=1 },
			data = {
				{ name = "air", prob = 0 },
				{ name = "mcl_flowers:double_fern", param1=255, },
				{ name = "mcl_flowers:double_fern_top", param1=255, },
			},
		},
		replacements = {
			["mcl_flowers:fern"] = "mcl_flowers:double_fern"
		},
		place_on = {"mcl_core:dirt_with_grass"},

		sidelen = 16,
		noise_params = {
			offset = 0.15,
			scale = 0.1,
			spread = {x = 250, y = 250, z = 250},
			seed = 333,
			octaves = 2,
			persist = 0.60,
		},
		biomes = { "JungleM" },
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
	})

	-- Large flowers
	local register_large_flower = function(name, biomes, seed, offset, flower_forest_offset)
		local maxi
		if flower_forest_offset then
			maxi = 2
		else
			maxi = 1
		end
		for i=1, maxi do
			local o, b -- offset, biomes
			if i == 1 then
				o = offset
				b = biomes
			else
				o = flower_forest_offset
				b = { "FlowerForest" }
			end

			minetest.register_decoration({
				deco_type = "schematic",
				schematic = {
					size = { x=1, y=3, z=1 },
					data = {
						{ name = "air", prob = 0 },
						{ name = "mcl_flowers:"..name, param1=255, },
						{ name = "mcl_flowers:"..name.."_top", param1=255, },
					},
				},
				place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},

				sidelen = 16,
				noise_params = {
					offset = o,
					scale = 0.01,
					spread = {x = 300, y = 300, z = 300},
					seed = seed,
					octaves = 5,
					persist = 0.62,
				},
				y_min = 1,
				y_max = mcl_vars.mg_overworld_max,
				flags = "",
				biomes = b,
			})
		end
	end

	register_large_flower("rose_bush", {"Forest"}, 9350, -0.008, 0.003)
	register_large_flower("peony", {"Forest"}, 10450, -0.008, 0.003)
	register_large_flower("lilac", {"Forest"}, 10600, -0.007, 0.003)
	register_large_flower("sunflower", {"SunflowerPlains"}, 2940, 0.01)

	-- Jungle bush

	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 80,
		noise_params = {
			offset = 0.0196,
			scale = 0.025,
			spread = {x = 250, y = 250, z = 250},
			seed = 2930,
			octaves = 4,
			persist = 0.6,
		},
		biomes = {"Jungle"},
		y_min = 3,
		y_max = mcl_vars.mg_overworld_max,
		schematic = jungle_bush_schematic,
		flags = "place_center_x, place_center_z",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 80,
		noise_params = {
			offset = 0.05,
			scale = 0.025,
			spread = {x = 250, y = 250, z = 250},
			seed = 2930,
			octaves = 4,
			persist = 0.6,
		},
		biomes = {"JungleM"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = jungle_bush_schematic,
		flags = "place_center_x, place_center_z",
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
		sidelen = 80,
		noise_params = {
			offset = 0.0085,
			scale = 0.025,
			spread = {x = 250, y = 250, z = 250},
			seed = 2930,
			octaves = 4,
			persist = 0.6,
		},
		biomes = {"JungleEdge", "JungleEdgeM"},
		y_min = 3,
		y_max = mcl_vars.mg_overworld_max,
		schematic_jungle_bush_schematic,
		flags = "place_center_x, place_center_z",
	})

	-- Fallen logs
	-- These fallen logs are not really good yet. They must be longer and also have one upright block.
	-- Note the decortion API does not like wide schematics, they are likely to overhang.
	if generate_fallen_logs then
		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass", "mcl_core:podzol", "mcl_core:coarse_dirt"},
			sidelen = 80,
			noise_params = {
				offset = 0.00018,
				scale = 0.00011,
				spread = {x = 250, y = 250, z = 250},
				seed = 2,
				octaves = 3,
				persist = 0.66
			},
			biomes = {"MegaTaiga", "MegaSpruceTaiga", "Taiga"},
			y_min = 1,
			y_max = mcl_vars.mg_overworld_max,
			schematic = {
				size = {x = 3, y = 3, z = 1},
				data = {
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "mcl_core:sprucetree", param2 = 12, prob = 127},
					{name = "mcl_core:sprucetree", param2 = 12},
					{name = "mcl_core:sprucetree", param2 = 12},
					{name = "air", prob = 0},
					{name = "mcl_mushrooms:mushroom_brown", prob = 160},
					{name = "mcl_mushrooms:mushroom_red", prob = 160},
				},
			},
			flags = "place_center_x",
			rotation = "random",
		})

		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass_snow", "mcl_core:dirt_with_grass", "mcl_core:podzol", "mcl_core:podzol_snow", "mcl_core:coarse_dirt"},
			sidelen = 80,
			noise_params = {
				offset = 0.00018,
				scale = 0.00011,
				spread = {x = 250, y = 250, z = 250},
				seed = 2,
				octaves = 3,
				persist = 0.66
			},
			biomes = {"ColdTaiga"},
			y_min = 1,
			y_max = mcl_vars.mg_overworld_max,
			schematic = {
				size = {x = 3, y = 3, z = 1},
				data = {
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "mcl_core:sprucetree", param2 = 12, prob = 127},
					{name = "mcl_core:sprucetree", param2 = 12},
					{name = "mcl_core:sprucetree", param2 = 12},
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "air", prob = 0},
				},
			},
			flags = "place_center_x",
			rotation = "random",
		})

		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass"},
			sidelen = 16,
			noise_params = {
				offset = 0.0,
				scale = -0.00008,
				spread = {x = 250, y = 250, z = 250},
				seed = 2,
				octaves = 3,
				persist = 0.66
			},
			biomes = {"BirchForest", "BirchForestM",},
			y_min = 1,
			y_max = mcl_vars.mg_overworld_max,
			schematic = {
				size = {x = 3, y = 3, z = 1},
				data = {
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "mcl_core:birchtree", param2 = 12},
					{name = "mcl_core:birchtree", param2 = 12},
					{name = "mcl_core:birchtree", param2 = 12, prob = 127},
					{name = "mcl_mushrooms:mushroom_red", prob = 100},
					{name = "mcl_mushrooms:mushroom_brown", prob = 10},
					{name = "air", prob = 0},
				},
			},
			flags = "place_center_x",
			rotation = "random",
		})

		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
			sidelen = 80,
			fill_ratio = 0.005,
			biomes = {"Jungle", "JungleM"},
			y_min = 1,
			y_max = mcl_vars.mg_overworld_max,
			schematic = {
				size = {x = 3, y = 3, z = 1},
				data = {
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "mcl_core:jungletree", param2 = 12},
					{name = "mcl_core:jungletree", param2 = 12},
					{name = "mcl_core:jungletree", param2 = 12, prob = 127},
					{name = "air", prob = 0},
					{name = "mcl_mushrooms:mushroom_brown", prob = 50},
					{name = "air", prob = 0},
				},
			},
			flags = "place_center_x",
			rotation = "random",
		})

		minetest.register_decoration({
			deco_type = "schematic",
			place_on = {"mcl_core:dirt_with_grass"},
			sidelen = 16,
			noise_params = {
				offset = 0.00018,
				scale = 0.00011,
				spread = {x = 250, y = 250, z = 250},
				seed = 2,
				octaves = 3,
				persist = 0.66
			},
			biomes = {"Forest"},
			y_min = 1,
			y_max = mcl_vars.mg_overworld_max,
			schematic = {
				size = {x = 3, y = 3, z = 1},
				data = {
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "air", prob = 0},
					{name = "mcl_core:tree", param2 = 12, prob = 127},
					{name = "mcl_core:tree", param2 = 12},
					{name = "mcl_core:tree", param2 = 12},
					{name = "air", prob = 0},
					{name = "mcl_mushrooms:mushroom_brown", prob = 96},
					{name = "mcl_mushrooms:mushroom_red", prob = 96},
				},
			},
			flags = "place_center_x",
			rotation = "random",
		})
	end

	-- 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 })

		minetest.register_decoration({
			deco_type = "schematic",
			schematic = {
				size = { x=1, y=height, z=1 },
				data = lily_schem,
			},
			place_on = "mcl_core:dirt",
			sidelen = 16,
			noise_params = {
				offset = 0,
				scale = 0.3,
				spread = {x = 100, y = 100, z = 100},
				seed = 503,
				octaves = 6,
				persist = 0.7,
			},
			y_min = y,
			y_max = y,
			biomes = { "Swampland_shore" },
			rotation = "random",
		})
	end

	-- Melon
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"mcl_core:dirt_with_grass"},
		sidelen = 16,
		noise_params = {
			offset = -0.01,
			scale = 0.006,
			spread = {x = 250, y = 250, z = 250},
			seed = 333,
			octaves = 3,
			persist = 0.6
		},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_farming:melon",
		biomes = { "Jungle" },
	})
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"mcl_core:dirt_with_grass"},
		sidelen = 16,
		noise_params = {
			offset = 0.0,
			scale = 0.006,
			spread = {x = 250, y = 250, z = 250},
			seed = 333,
			octaves = 3,
			persist = 0.6
		},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_farming:melon",
		biomes = { "JungleM" },
	})
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"mcl_core:dirt_with_grass"},
		sidelen = 16,
		noise_params = {
			offset = -0.005,
			scale = 0.006,
			spread = {x = 250, y = 250, z = 250},
			seed = 333,
			octaves = 3,
			persist = 0.6
		},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_farming:melon",
		biomes = { "JungleEdge", "JungleEdgeM" },
	})

	-- Lots of melons in Jungle Edge M
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"mcl_core:dirt_with_grass"},
		sidelen = 80,
		noise_params = {
			offset = 0.013,
			scale = 0.006,
			spread = {x = 125, y = 125, z = 125},
			seed = 333,
			octaves = 3,
			persist = 0.6
		},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_farming:melon",
		biomes = { "JungleEdgeM" },
	})

	-- Pumpkin
	minetest.register_decoration({
		deco_type = "schematic",
		schematic = {
			size = { x=1, y=2, z=1 },
			data = {
				{ name = "air", prob = 0 },
				{ name = "mcl_farming:pumpkin_face", param1=255, },
			},
		},
		place_on = {"mcl_core:dirt_with_grass"},
		sidelen = 16,
		noise_params = {
			offset = -0.016,
			scale = 0.01332,
			spread = {x = 125, y = 125, z = 125},
			seed = 666,
			octaves = 6,
			persist = 0.666
		},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		rotation = "random",
	})

	-- Grasses and ferns
	local grass_forest = {"Plains", "Taiga", "Forest", "FlowerForest", "BirchForest", "BirchForestM", "RoofedForest", "Swampland", "MesaPlateauF_grasstop" }
	local grass_plains = {"Plains", "SunflowerPlains", "JungleEdge", "JungleEdgeM" }
	local grass_savanna = {"Savanna", "SavannaM"}
	local grass_sparse = {"ExtremeHills", "ExtremeHills+", "ExtremeHills+_snowtop", "ExtremeHillsM", "Jungle", }

	register_grass_decoration("tallgrass", -0.03,  0.09, grass_forest)
	register_grass_decoration("tallgrass", -0.015, 0.075, grass_forest)
	register_grass_decoration("tallgrass", 0,      0.06, grass_forest)
	register_grass_decoration("tallgrass", 0.015,  0.045, grass_forest)
	register_grass_decoration("tallgrass", 0.03,   0.03, grass_forest)
	register_grass_decoration("tallgrass", 0.01, 0.05, grass_forest)
	register_grass_decoration("tallgrass", 0.03, 0.03, grass_plains)
	register_grass_decoration("tallgrass", 0.05, 0.01, grass_plains)
	register_grass_decoration("tallgrass", 0.07, -0.01, grass_plains)
	register_grass_decoration("tallgrass", 0.09, -0.03, grass_plains)
	register_grass_decoration("tallgrass", 0.18, -0.03, grass_savanna)
	register_grass_decoration("tallgrass", 0.05, -0.03, grass_sparse)

	local fern_minimal = { "Jungle", "JungleM", "JungleEdge", "JungleEdgeM", "Taiga", "MegaTaiga", "MegaSpruceTaiga", "ColdTaiga" }
	local fern_low = { "Jungle", "JungleM", "JungleEdge", "JungleEdgeM", "Taiga", "MegaTaiga", "MegaSpruceTaiga" }
	local fern_Jungle = { "Jungle", "JungleM", "JungleEdge", "JungleEdgeM" }
	local fern_JungleM = { "JungleM" },
	register_grass_decoration("fern", -0.03,  0.09, fern_minimal)
	register_grass_decoration("fern", -0.015, 0.075, fern_minimal)
	register_grass_decoration("fern", 0,      0.06, fern_minimal)
	register_grass_decoration("fern", 0.015,  0.045, fern_low)
	register_grass_decoration("fern", 0.03,   0.03, fern_low)
	register_grass_decoration("fern", 0.01, 0.05, fern_Jungle)
	register_grass_decoration("fern", 0.03, 0.03, fern_Jungle)
	register_grass_decoration("fern", 0.05, 0.01, fern_Jungle)
	register_grass_decoration("fern", 0.07, -0.01, fern_Jungle)
	register_grass_decoration("fern", 0.09, -0.03, fern_Jungle)
	register_grass_decoration("fern", 0.12, -0.03, fern_JungleM)

	-- Place tall grass on snow in Ice Plains and Extreme Hills+
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt_with_grass_snow"},
		sidelen = 16,
		noise_params = {
			offset = -0.08,
			scale = 0.09,
			spread = {x = 15, y = 15, z = 15},
			seed = 420,
			octaves = 3,
			persist = 0.6,
		},
		biomes = {"IcePlains"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = {
			size = { x=1, y=2, z=1 },
			data = {
				{ name = "mcl_core:dirt_with_grass", force_place=true, },
				{ name = "mcl_flowers:tallgrass", },
			},
		},
	})
	minetest.register_decoration({
		deco_type = "schematic",
		place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt_with_grass_snow"},
		sidelen = 16,
		noise_params = {
			offset = 0.0,
			scale = 0.09,
			spread = {x = 15, y = 15, z = 15},
			seed = 420,
			octaves = 3,
			persist = 0.6,
		},
		biomes = {"ExtremeHills+_snowtop"},
		y_min = 1,
		y_max = mcl_vars.mg_overworld_max,
		schematic = {
			size = { x=1, y=2, z=1 },
			data = {
				{ name = "mcl_core:dirt_with_grass", force_place=true, },
				{ name = "mcl_flowers:tallgrass", },
			},
		},
	})


	-- Dead bushes
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"group:sand", "mcl_core:podzol", "mcl_core:podzol_snow", "mcl_core:dirt", "mcl_core:coarse_dirt", "group:hardened_clay"},
		sidelen = 16,
		noise_params = {
			offset = 0,
			scale = 0.035,
			spread = {x = 100, y = 100, z = 100},
			seed = 1972,
			octaves = 3,
			persist = 0.6
		},
		y_min = 4,
		y_max = mcl_vars.mg_overworld_max,
		biomes = {"Desert", "Mesa", "Mesa_sandlevel", "MesaPlateauF", "MesaPlateauF_sandlevel", "MesaPlateauF_grasstop", "Taiga", "MegaTaiga"},
		decoration = "mcl_core:deadbush",
		height = 1,
	})

	-- Mushrooms in mushroom biome
	minetest.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 = mcl_vars.mg_overworld_min,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_mushrooms:mushroom_red",
	})
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"mcl_core:mycelium"},
		sidelen = 80,
		fill_ratio = 0.009,
		biomes = {"MushroomIsland", "MushroomIslandShore"},
		y_min = mcl_vars.mg_overworld_min,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_mushrooms:mushroom_brown",
	})

	-- Mushrooms in Taiga
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"mcl_core:podzol"},
		sidelen = 80,
		fill_ratio = 0.003,
		biomes = {"Taiga", "MegaTaiga", "MegaSpruceTaiga"},
		y_min = mcl_vars.mg_overworld_min,
		y_max = mcl_vars.mg_overworld_max,
		decoration = "mcl_mushrooms:mushroom_red",
	})
	minetest.register_decoration({
		deco_type = "simple",
		place_on = {"mcl_core:podzol"},
		sidelen = 80,
		fill_ratio = 0.003,
		biomes = {"Taiga", "MegaTaiga", "MegaSpruceTaiga"},
		y_min = mcl_vars.mg_overworld_min,
		y_max = mcl_vars.mg_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
		minetest.register_decoration({
			deco_type = "simple",
			place_on = {"mcl_core:dirt_with_grass", "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 = {x = 250, y = 250, z = 250},
				seed = mseeds[m],
				octaves = 3,
				persist = 0.66,
			},
			y_min = 1,
			y_max = mcl_vars.mg_overworld_max,
			decoration = mushrooms[m],
			spawn_by = { "mcl_core:tree", "mcl_core:sprucetree", "mcl_core:darktree", "mcl_core:birchtree" },
			num_spawn_by = 1,
		})

		-- More mushrooms in Swampland
		minetest.register_decoration({
			deco_type = "simple",
			place_on = {"mcl_core:dirt_with_grass", "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 = {x = 250, y = 250, z = 250},
				seed = mseeds[m],
				octaves = 3,
				persist = 0.6,
			},
			y_min = 1,
			y_max = mcl_vars.mg_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,
		})
	end
	local function register_flower(name, biomes, seed, is_in_flower_forest)
		if is_in_flower_forest == nil then
			is_in_flower_forest = true
		end
		if biomes then
			minetest.register_decoration({
				deco_type = "simple",
				place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
				sidelen = 16,
				noise_params = {
					offset = 0.0008,
					scale = 0.006,
					spread = {x = 100, y = 100, z = 100},
					seed = seed,
					octaves = 3,
					persist = 0.6
				},
				y_min = 1,
				y_max = mcl_vars.mg_overworld_max,
				biomes = biomes,
				decoration = "mcl_flowers:"..name,
			})
		end
		if is_in_flower_forest then
			minetest.register_decoration({
				deco_type = "simple",
				place_on = {"mcl_core:dirt_with_grass", "mcl_core:dirt"},
				sidelen = 80,
				noise_params= {
					offset = 0.0008*40,
					scale = 0.003,
					spread = {x = 100, y = 100, z = 100},
					seed = seed,
					octaves = 3,
					persist = 0.6,
				},
				y_min = 1,
				y_max = mcl_vars.mg_overworld_max,
				biomes = {"FlowerForest"},
				decoration = "mcl_flowers:"..name,
			})
		end
	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)
	register_flower("poppy", flower_biomes1, 9439)

	local flower_biomes2 = {"Plains", "SunflowerPlains"}
	register_flower("tulip_red", flower_biomes2, 436)
	register_flower("tulip_orange", flower_biomes2, 536)
	register_flower("tulip_pink", flower_biomes2, 636)
	register_flower("tulip_white", flower_biomes2, 736)
	register_flower("azure_bluet", flower_biomes2, 800)
	register_flower("oxeye_daisy", flower_biomes2, 3490)

	register_flower("allium", nil, 0) -- flower Forest only
	register_flower("blue_orchid", {"Swampland"}, 64500, false)

end

-- Decorations in non-Overworld dimensions
local function register_dimension_decorations()
	-- TODO
end

--
-- Detect mapgen to select functions
--
if mg_name ~= "singlenode" then
	minetest.clear_registered_biomes()
	minetest.clear_registered_decorations()
	minetest.clear_registered_schematics()
	if mg_name ~= "v6" and mg_name ~= "flat" then
		register_biomes()
		register_biomelike_ores()
		register_decorations()
	elseif mg_name == "flat" then
		-- Implementation of Minecraft's Superflat mapgen, classic style
		minetest.clear_registered_biomes()
		minetest.clear_registered_decorations()
		minetest.clear_registered_schematics()
		register_classic_superflat_biome()
	end

	-- Non-overworld stuff is registered independently
	register_dimension_biomes()
	register_dimension_ores()
	register_dimension_decorations()

	-- Overworld decorations for v6 are handled in mcl_mapgen_core
end