Default / flowers: New biomes. Limit dirt blobs. Add corals, bushes

Biomes:
Add 'sandstone desert', 'cold desert', 'snowy grassland'.
Rename 'glacier' biome to 'icesheet' biome.
Rename non-swamp 'swamp' biomes to 'shore' biomes.
Remove 'sandstone grassland' biome.
Rename 'stone grassland' biome to 'grassland' biome.
Edit biome points for improved similarity to Whittaker classification.
Change 'tundra' to bare stone with snowblocks.
Make dirt 'swamp' / 'shore' less deep.

Ores:
Make dirt blob ore biome-specific, limit to dirt biomes.

Decorations:
Make mushroom noise spread match that of appletrees as originally intended,
to have mushrooms spawn in darker thicker forest areas.
Add coral reefs in warm oceans.
Add bushes and acacia bushes.
Jungletrees in deeper water for larger swamps.

Register flower mod decorations in singlenode mapgen for use by
minetest.generate_registered_decorations, as in default/mapgen.lua.

mods/default/mapgen.lua

@@ -43,6 +43,7 @@ minetest.register_alias("mapgen_stair_sandstonebrick", "stairs:stair_sandstonebr
 --
 
 function default.register_ores()
+	minetest.clear_registered_ores()
 	-- Blob ores
 	-- These first to avoid other ores in blobs
 
@@ -109,6 +110,8 @@ function default.register_ores()
 			octaves = 1,
 			persist = 0.0
 		},
+		biomes = {"taiga", "snowy_grassland", "grassland", "coniferous_forest",
+			"deciduous_forest", "savanna", "rainforest"}
 	})
 
 	-- Gravel
@@ -379,10 +382,10 @@ end
 function default.register_biomes()
 	minetest.clear_registered_biomes()
 
-	-- Permanent ice
+	-- Icesheet
 
 	minetest.register_biome({
-		name = "glacier",
+		name = "icesheet",
 		node_dust = "default:snowblock",
 		node_top = "default:snowblock",
 		depth_top = 1,
@@ -398,36 +401,36 @@ function default.register_biomes()
 		y_min = -8,
 		y_max = 31000,
 		heat_point = 0,
-		humidity_point = 50,
+		humidity_point = 73,
 	})
 
 	minetest.register_biome({
-		name = "glacier_ocean",
+		name = "icesheet_ocean",
 		node_dust = "default:snowblock",
 		node_top = "default:sand",
 		depth_top = 1,
 		node_filler = "default:sand",
 		depth_filler = 3,
 		--node_stone = "",
-		--node_water_top = "",
+		node_water_top = "default:ice",
-		--depth_water_top = ,
+		depth_water_top = 10,
 		--node_water = "",
 		--node_river_water = "",
 		y_min = -112,
 		y_max = -9,
 		heat_point = 0,
-		humidity_point = 50,
+		humidity_point = 73,
 	})
 
-	-- Cold
+	-- Tundra
 
 	minetest.register_biome({
 		name = "tundra",
-		--node_dust = "",
+		node_dust = "default:snowblock",
-		node_top = "default:dirt_with_snow",
+		--node_top = ,
-		depth_top = 1,
+		--depth_top = ,
-		node_filler = "default:dirt",
+		--node_filler = ,
-		depth_filler = 1,
+		--depth_filler = ,
 		--node_stone = "",
 		--node_water_top = "",
 		--depth_water_top = ,
@@ -437,8 +440,8 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = 2,
 		y_max = 31000,
-		heat_point = 15,
+		heat_point = 0,
-		humidity_point = 35,
+		humidity_point = 40,
 	})
 
 	minetest.register_biome({
@@ -457,8 +460,8 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = -3,
 		y_max = 1,
-		heat_point = 15,
+		heat_point = 0,
-		humidity_point = 35,
+		humidity_point = 40,
 	})
 
 	minetest.register_biome({
@@ -477,10 +480,11 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = -112,
 		y_max = -4,
-		heat_point = 15,
+		heat_point = 0,
-		humidity_point = 35,
+		humidity_point = 40,
 	})
 
+	-- Taiga
 
 	minetest.register_biome({
 		name = "taiga",
@@ -498,8 +502,8 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = 2,
 		y_max = 31000,
-		heat_point = 15,
+		heat_point = 25,
-		humidity_point = 65,
+		humidity_point = 70,
 	})
 
 	minetest.register_biome({
@@ -518,16 +522,16 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = -112,
 		y_max = 1,
-		heat_point = 15,
+		heat_point = 25,
-		humidity_point = 65,
+		humidity_point = 70,
 	})
 
-	-- Temperate
+	-- Snowy grassland
 
 	minetest.register_biome({
-		name = "stone_grassland",
+		name = "snowy_grassland",
-		--node_dust = "",
+		node_dust = "default:snow",
-		node_top = "default:dirt_with_grass",
+		node_top = "default:dirt_with_snow",
 		depth_top = 1,
 		node_filler = "default:dirt",
 		depth_filler = 1,
@@ -538,34 +542,14 @@ function default.register_biomes()
 		--node_river_water = "",
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
-		y_min = 6,
-		y_max = 31000,
-		heat_point = 40,
-		humidity_point = 35,
-	})
-
-	minetest.register_biome({
-		name = "stone_grassland_dunes",
-		--node_dust = "",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 2,
-		--node_stone = "",
-		--node_water_top = "",
-		--depth_water_top = ,
-		--node_water = "",
-		--node_river_water = "",
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
 		y_min = 5,
-		y_max = 5,
+		y_max = 31000,
-		heat_point = 40,
+		heat_point = 20,
 		humidity_point = 35,
 	})
 
 	minetest.register_biome({
-		name = "stone_grassland_ocean",
+		name = "snowy_grassland_ocean",
 		--node_dust = "",
 		node_top = "default:sand",
 		depth_top = 1,
@@ -580,10 +564,73 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = -112,
 		y_max = 4,
-		heat_point = 40,
+		heat_point = 20,
 		humidity_point = 35,
 	})
 
+	-- Grassland
+
+	minetest.register_biome({
+		name = "grassland",
+		--node_dust = "",
+		node_top = "default:dirt_with_grass",
+		depth_top = 1,
+		node_filler = "default:dirt",
+		depth_filler = 1,
+		--node_stone = "",
+		--node_water_top = "",
+		--depth_water_top = ,
+		--node_water = "",
+		--node_river_water = "",
+		node_riverbed = "default:sand",
+		depth_riverbed = 2,
+		y_min = 6,
+		y_max = 31000,
+		heat_point = 50,
+		humidity_point = 35,
+	})
+
+	minetest.register_biome({
+		name = "grassland_dunes",
+		--node_dust = "",
+		node_top = "default:sand",
+		depth_top = 1,
+		node_filler = "default:sand",
+		depth_filler = 2,
+		--node_stone = "",
+		--node_water_top = "",
+		--depth_water_top = ,
+		--node_water = "",
+		--node_river_water = "",
+		node_riverbed = "default:sand",
+		depth_riverbed = 2,
+		y_min = 5,
+		y_max = 5,
+		heat_point = 50,
+		humidity_point = 35,
+	})
+
+	minetest.register_biome({
+		name = "grassland_ocean",
+		--node_dust = "",
+		node_top = "default:sand",
+		depth_top = 1,
+		node_filler = "default:sand",
+		depth_filler = 3,
+		--node_stone = "",
+		--node_water_top = "",
+		--depth_water_top = ,
+		--node_water = "",
+		--node_river_water = "",
+		node_riverbed = "default:sand",
+		depth_riverbed = 2,
+		y_min = -112,
+		y_max = 4,
+		heat_point = 50,
+		humidity_point = 35,
+	})
+
+	-- Coniferous forest
 
 	minetest.register_biome({
 		name = "coniferous_forest",
@@ -601,8 +648,8 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = 6,
 		y_max = 31000,
-		heat_point = 40,
+		heat_point = 45,
-		humidity_point = 65,
+		humidity_point = 70,
 	})
 
 	minetest.register_biome({
@@ -621,8 +668,8 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = 5,
 		y_max = 5,
-		heat_point = 40,
+		heat_point = 45,
-		humidity_point = 65,
+		humidity_point = 70,
 	})
 
 	minetest.register_biome({
@@ -641,71 +688,11 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = -112,
 		y_max = 4,
-		heat_point = 40,
+		heat_point = 45,
-		humidity_point = 65,
+		humidity_point = 70,
-	})
-
-
-	minetest.register_biome({
-		name = "sandstone_grassland",
-		--node_dust = "",
-		node_top = "default:dirt_with_grass",
-		depth_top = 1,
-		node_filler = "default:dirt",
-		depth_filler = 1,
-		node_stone = "default:sandstone",
-		--node_water_top = "",
-		--depth_water_top = ,
-		--node_water = "",
-		--node_river_water = "",
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		y_min = 6,
-		y_max = 31000,
-		heat_point = 60,
-		humidity_point = 35,
-	})
-
-	minetest.register_biome({
-		name = "sandstone_grassland_dunes",
-		--node_dust = "",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 2,
-		node_stone = "default:sandstone",
-		--node_water_top = "",
-		--depth_water_top = ,
-		--node_water = "",
-		--node_river_water = "",
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		y_min = 5,
-		y_max = 5,
-		heat_point = 60,
-		humidity_point = 35,
-	})
-
-	minetest.register_biome({
-		name = "sandstone_grassland_ocean",
-		--node_dust = "",
-		node_top = "default:sand",
-		depth_top = 1,
-		node_filler = "default:sand",
-		depth_filler = 3,
-		node_stone = "default:sandstone",
-		--node_water_top = "",
-		--depth_water_top = ,
-		--node_water = "",
-		--node_river_water = "",
-		node_riverbed = "default:sand",
-		depth_riverbed = 2,
-		y_min = -112,
-		y_max = 4,
-		heat_point = 60,
-		humidity_point = 35,
 	})
 
+	-- Deciduous forest
 
 	minetest.register_biome({
 		name = "deciduous_forest",
@@ -724,11 +711,11 @@ function default.register_biomes()
 		y_min = 1,
 		y_max = 31000,
 		heat_point = 60,
-		humidity_point = 65,
+		humidity_point = 68,
 	})
 
 	minetest.register_biome({
-		name = "deciduous_forest_swamp",
+		name = "deciduous_forest_shore",
 		--node_dust = "",
 		node_top = "default:dirt",
 		depth_top = 1,
@@ -741,10 +728,10 @@ function default.register_biomes()
 		--node_river_water = "",
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
-		y_min = -3,
+		y_min = -1,
 		y_max = 0,
 		heat_point = 60,
-		humidity_point = 65,
+		humidity_point = 68,
 	})
 
 	minetest.register_biome({
@@ -762,12 +749,12 @@ function default.register_biomes()
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
 		y_min = -112,
-		y_max = -4,
+		y_max = -2,
 		heat_point = 60,
-		humidity_point = 65,
+		humidity_point = 68,
 	})
 
-	-- Hot
+	-- Desert
 
 	minetest.register_biome({
 		name = "desert",
@@ -785,8 +772,8 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = 5,
 		y_max = 31000,
-		heat_point = 85,
+		heat_point = 92,
-		humidity_point = 20,
+		humidity_point = 16,
 	})
 
 	minetest.register_biome({
@@ -805,10 +792,95 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = -112,
 		y_max = 4,
-		heat_point = 85,
+		heat_point = 92,
-		humidity_point = 20,
+		humidity_point = 16,
 	})
 
+	-- Sandstone desert
+
+	minetest.register_biome({
+		name = "sandstone_desert",
+		--node_dust = "",
+		node_top = "default:sand",
+		depth_top = 1,
+		node_filler = "default:sand",
+		depth_filler = 0,
+		node_stone = "default:sandstone",
+		--node_water_top = "",
+		--depth_water_top = ,
+		--node_water = "",
+		--node_river_water = "",
+		node_riverbed = "default:sand",
+		depth_riverbed = 2,
+		y_min = 5,
+		y_max = 31000,
+		heat_point = 60,
+		humidity_point = 0,
+	})
+
+	minetest.register_biome({
+		name = "sandstone_desert_ocean",
+		--node_dust = "",
+		node_top = "default:sand",
+		depth_top = 1,
+		node_filler = "default:sand",
+		depth_filler = 3,
+		node_stone = "default:sandstone",
+		--node_water_top = "",
+		--depth_water_top = ,
+		--node_water = "",
+		--node_river_water = "",
+		node_riverbed = "default:sand",
+		depth_riverbed = 2,
+		y_min = -112,
+		y_max = 4,
+		heat_point = 60,
+		humidity_point = 0,
+	})
+
+	-- Cold desert
+
+	minetest.register_biome({
+		name = "cold_desert",
+		--node_dust = "",
+		node_top = "default:silver_sand",
+		depth_top = 1,
+		node_filler = "default:silver_sand",
+		depth_filler = 1,
+		--node_stone = "",
+		--node_water_top = "",
+		--depth_water_top = ,
+		--node_water = "",
+		--node_river_water = "",
+		node_riverbed = "default:sand",
+		depth_riverbed = 2,
+		y_min = 5,
+		y_max = 31000,
+		heat_point = 40,
+		humidity_point = 0,
+	})
+
+	minetest.register_biome({
+		name = "cold_desert_ocean",
+		--node_dust = "",
+		node_top = "default:sand",
+		depth_top = 1,
+		node_filler = "default:sand",
+		depth_filler = 3,
+		--node_stone = "",
+		--node_water_top = "",
+		--depth_water_top = ,
+		--node_water = "",
+		--node_river_water = "",
+		node_riverbed = "default:sand",
+		depth_riverbed = 2,
+		y_min = -112,
+		y_max = 4,
+		heat_point = 40,
+		humidity_point = 0,
+	})
+
+	-- Savanna
 
 	minetest.register_biome({
 		name = "savanna",
@@ -826,12 +898,12 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = 1,
 		y_max = 31000,
-		heat_point = 85,
+		heat_point = 89,
-		humidity_point = 50,
+		humidity_point = 42,
 	})
 
 	minetest.register_biome({
-		name = "savanna_swamp",
+		name = "savanna_shore",
 		--node_dust = "",
 		node_top = "default:dirt",
 		depth_top = 1,
@@ -844,10 +916,10 @@ function default.register_biomes()
 		--node_river_water = "",
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
-		y_min = -3,
+		y_min = -1,
 		y_max = 0,
-		heat_point = 85,
+		heat_point = 89,
-		humidity_point = 50,
+		humidity_point = 42,
 	})
 
 	minetest.register_biome({
@@ -865,11 +937,12 @@ function default.register_biomes()
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
 		y_min = -112,
-		y_max = -4,
+		y_max = -2,
-		heat_point = 85,
+		heat_point = 89,
-		humidity_point = 50,
+		humidity_point = 42,
 	})
 
+	-- Rainforest
 
 	minetest.register_biome({
 		name = "rainforest",
@@ -887,8 +960,8 @@ function default.register_biomes()
 		depth_riverbed = 2,
 		y_min = 1,
 		y_max = 31000,
-		heat_point = 85,
+		heat_point = 86,
-		humidity_point = 80,
+		humidity_point = 65,
 	})
 
 	minetest.register_biome({
@@ -905,10 +978,10 @@ function default.register_biomes()
 		--node_river_water = "",
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
-		y_min = -3,
+		y_min = -1,
 		y_max = 0,
-		heat_point = 85,
+		heat_point = 86,
-		humidity_point = 80,
+		humidity_point = 65,
 	})
 
 	minetest.register_biome({
@@ -926,9 +999,9 @@ function default.register_biomes()
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
 		y_min = -112,
-		y_max = -4,
+		y_max = -2,
-		heat_point = 85,
+		heat_point = 86,
-		humidity_point = 80,
+		humidity_point = 65,
 	})
 
 	-- Underground
@@ -1047,7 +1120,8 @@ function default.register_mgv6_decorations()
 	})
 end
 
--- All mapgens except mgv6 and singlenode
+
+-- All mapgens except mgv6
 
 local function register_grass_decoration(offset, scale, length)
 	minetest.register_decoration({
@@ -1062,13 +1136,11 @@ local function register_grass_decoration(offset, scale, length)
 			octaves = 3,
 			persist = 0.6
 		},
-		biomes = {"stone_grassland", "sandstone_grassland",
+		biomes = {"grassland", "grassland_dunes", "deciduous_forest",
-			"deciduous_forest", "coniferous_forest",
+			"coniferous_forest", "coniferous_forest_dunes"},
-			"stone_grassland_dunes", "sandstone_grassland_dunes",
-			"coniferous_forest_dunes"},
 		y_min = 1,
 		y_max = 31000,
-		decoration = "default:grass_"..length,
+		decoration = "default:grass_" .. length,
 	})
 end
 
@@ -1088,10 +1160,11 @@ local function register_dry_grass_decoration(offset, scale, length)
 		biomes = {"savanna"},
 		y_min = 1,
 		y_max = 31000,
-		decoration = "default:dry_grass_"..length,
+		decoration = "default:dry_grass_" .. length,
 	})
 end
 
+
 function default.register_decorations()
 	minetest.clear_registered_decorations()
 
@@ -1112,7 +1185,7 @@ function default.register_decorations()
 		biomes = {"deciduous_forest"},
 		y_min = 1,
 		y_max = 31000,
-		schematic = minetest.get_modpath("default").."/schematics/apple_tree.mts",
+		schematic = minetest.get_modpath("default") .. "/schematics/apple_tree.mts",
 		flags = "place_center_x, place_center_z",
 	})
 
@@ -1157,9 +1230,9 @@ function default.register_decorations()
 		sidelen = 80,
 		fill_ratio = 0.1,
 		biomes = {"rainforest", "rainforest_swamp"},
-		y_min = 0,
+		y_min = -1,
 		y_max = 31000,
-		schematic = minetest.get_modpath("default").."/schematics/jungle_tree.mts",
+		schematic = minetest.get_modpath("default") .. "/schematics/jungle_tree.mts",
 		flags = "place_center_x, place_center_z",
 		rotation = "random",
 	})
@@ -1207,7 +1280,7 @@ function default.register_decorations()
 		biomes = {"taiga", "coniferous_forest"},
 		y_min = 2,
 		y_max = 31000,
-		schematic = minetest.get_modpath("default").."/schematics/pine_tree.mts",
+		schematic = minetest.get_modpath("default") .. "/schematics/pine_tree.mts",
 		flags = "place_center_x, place_center_z",
 	})
 
@@ -1261,7 +1334,7 @@ function default.register_decorations()
 		biomes = {"savanna"},
 		y_min = 1,
 		y_max = 31000,
-		schematic = minetest.get_modpath("default").."/schematics/acacia_tree.mts",
+		schematic = minetest.get_modpath("default") .. "/schematics/acacia_tree.mts",
 		flags = "place_center_x, place_center_z",
 		rotation = "random",
 	})
@@ -1313,7 +1386,7 @@ function default.register_decorations()
 		biomes = {"deciduous_forest"},
 		y_min = 1,
 		y_max = 31000,
-		schematic = minetest.get_modpath("default").."/schematics/aspen_tree.mts",
+		schematic = minetest.get_modpath("default") .. "/schematics/aspen_tree.mts",
 		flags = "place_center_x, place_center_z",
 	})
 
@@ -1349,6 +1422,7 @@ function default.register_decorations()
 		flags = "place_center_x",
 		rotation = "random",
 	})
+
 	-- Large cactus
 
 	minetest.register_decoration({
@@ -1366,7 +1440,7 @@ function default.register_decorations()
 		biomes = {"desert"},
 		y_min = 5,
 		y_max = 31000,
-		schematic = minetest.get_modpath("default").."/schematics/large_cactus.mts",
+		schematic = minetest.get_modpath("default") .. "/schematics/large_cactus.mts",
 		flags = "place_center_x",
 		rotation = "random",
 	})
@@ -1407,10 +1481,52 @@ function default.register_decorations()
 			octaves = 3,
 			persist = 0.7
 		},
-		biomes = {"savanna_swamp"},
+		biomes = {"savanna_shore"},
 		y_min = 0,
 		y_max = 0,
-		schematic = minetest.get_modpath("default").."/schematics/papyrus.mts",
+		schematic = minetest.get_modpath("default") .. "/schematics/papyrus.mts",
+	})
+
+	-- Bush
+
+	minetest.register_decoration({
+		deco_type = "schematic",
+		place_on = {"default:dirt_with_grass", "default:dirt_with_snow"},
+		sidelen = 16,
+		noise_params = {
+			offset = -0.004,
+			scale = 0.01,
+			spread = {x = 100, y = 100, z = 100},
+			seed = 137,
+			octaves = 3,
+			persist = 0.7,
+		},
+		biomes = {"snowy_grassland", "grassland", "deciduous_forest"},
+		y_min = 1,
+		y_max = 31000,
+		schematic = minetest.get_modpath("default") .. "/schematics/bush.mts",
+		flags = "place_center_x, place_center_z",
+	})
+
+	-- Acacia bush
+
+	minetest.register_decoration({
+		deco_type = "schematic",
+		place_on = {"default:dirt_with_dry_grass"},
+		sidelen = 16,
+		noise_params = {
+			offset = -0.004,
+			scale = 0.01,
+			spread = {x = 100, y = 100, z = 100},
+			seed = 90155,
+			octaves = 3,
+			persist = 0.7,
+		},
+		biomes = {"savanna"},
+		y_min = 1,
+		y_max = 31000,
+		schematic = minetest.get_modpath("default") .. "/schematics/acacia_bush.mts",
+		flags = "place_center_x, place_center_z",
 	})
 
 	-- Grasses
@@ -1446,7 +1562,8 @@ function default.register_decorations()
 
 	minetest.register_decoration({
 		deco_type = "simple",
-		place_on = {"default:desert_sand", "default:dirt_with_snow"},
+		place_on = {"default:desert_sand",
+			"default:sand", "default:silver_sand"},
 		sidelen = 16,
 		noise_params = {
 			offset = 0,
@@ -1456,11 +1573,36 @@ function default.register_decorations()
 			octaves = 3,
 			persist = 0.6
 		},
-		biomes = {"desert", "tundra"},
+		biomes = {"desert", "sandstone_desert", "cold_desert"},
 		y_min = 2,
 		y_max = 31000,
 		decoration = "default:dry_shrub",
 	})
+
+	-- Coral reef
+
+	minetest.register_decoration({
+		deco_type = "schematic",
+		place_on = {"default:sand"},
+		noise_params = {
+			offset = -0.1,
+			scale = 0.1,
+			spread = {x = 200, y = 200, z = 200},
+			seed = 7013,
+			octaves = 3,
+			persist = 1,
+		},
+		biomes = {
+			"desert_ocean",
+			"savanna_ocean",
+			"rainforest_ocean",
+		},
+		y_min = -8,
+		y_max = -2,
+		schematic = minetest.get_modpath("default") .. "/schematics/corals.mts",
+		flags = "place_center_x, place_center_z",
+		rotation = "random",
+	})
 end
 
 

mods/flowers/mapgen.lua

@@ -94,8 +94,7 @@ local function register_flower(seed, name)
 			octaves = 3,
 			persist = 0.6
 		},
-		biomes = {"stone_grassland", "sandstone_grassland",
+		biomes = {"grassland", "deciduous_forest", "coniferous_forest"},
-			"deciduous_forest", "coniferous_forest"},
 		y_min = 1,
 		y_max = 31000,
 		decoration = "flowers:"..name,
@@ -110,7 +109,7 @@ local function register_mushroom(name)
 		noise_params = {
 			offset = 0,
 			scale = 0.006,
-			spread = {x = 200, y = 200, z = 200},
+			spread = {x = 250, y = 250, z = 250},
 			seed = 2,
 			octaves = 3,
 			persist = 0.66
@@ -135,10 +134,10 @@ local function register_waterlily()
 			octaves = 3,
 			persist = 0.7
 		},
-		biomes = {"rainforest_swamp", "savanna_swamp", "deciduous_forest_swamp"},
+		biomes = {"rainforest_swamp", "savanna_shore", "deciduous_forest_shore"},
 		y_min = 0,
 		y_max = 0,
-		schematic = minetest.get_modpath("flowers").."/schematics/waterlily.mts",
+		schematic = minetest.get_modpath("flowers") .. "/schematics/waterlily.mts",
 		rotation = "random",
 	})
 end
@@ -162,12 +161,9 @@ end
 -- Detect mapgen to select functions
 --
 
--- Mods using singlenode mapgen can call these functions to enable
--- the use of minetest.generate_ores or minetest.generate_decorations
-
 local mg_name = minetest.get_mapgen_setting("mg_name")
 if mg_name == "v6" then
 	flowers.register_mgv6_decorations()
-elseif mg_name ~= "singlenode" then
+else
 	flowers.register_decorations()
 end