Biomes: New surface node for rainforest

Moist rainforest plant litter.
Textures by npx.

mods/default/README.txt

@@ -198,6 +198,10 @@ Ferk (CC0 1.0)
   default_item_smoke.png
   default_item_smoke.ogg, based on sound by http://opengameart.org/users/bart
 
+npx (CC BY-SA 3.0)
+  default_rainforest_litter.png
+  default_rainforest_litter_side.png
+
 Glass breaking sounds (CC BY 3.0):
   1: http://www.freesound.org/people/cmusounddesign/sounds/71947/
   2: http://www.freesound.org/people/Tomlija/sounds/97669/

mods/default/mapgen.lua

@@ -1058,7 +1058,7 @@ function default.register_biomes()
 	minetest.register_biome({
 		name = "rainforest",
 		--node_dust = "",
-		node_top = "default:dirt_with_grass",
+		node_top = "default:dirt_with_rainforest_litter",
 		depth_top = 1,
 		node_filler = "default:dirt",
 		depth_filler = 3,
@@ -1322,7 +1322,7 @@ function default.register_decorations()
 
 	minetest.register_decoration({
 		deco_type = "schematic",
-		place_on = {"default:dirt_with_grass", "default:dirt"},
+		place_on = {"default:dirt_with_rainforest_litter", "default:dirt"},
 		sidelen = 80,
 		fill_ratio = 0.1,
 		biomes = {"rainforest", "rainforest_swamp"},
@@ -1335,7 +1335,7 @@ function default.register_decorations()
 
 	minetest.register_decoration({
 		deco_type = "schematic",
-		place_on = {"default:dirt_with_grass", "default:dirt"},
+		place_on = {"default:dirt_with_rainforest_litter", "default:dirt"},
 		sidelen = 80,
 		fill_ratio = 0.005,
 		biomes = {"rainforest", "rainforest_swamp"},
@@ -1596,7 +1596,7 @@ function default.register_decorations()
 
 	minetest.register_decoration({
 		deco_type = "simple",
-		place_on = {"default:dirt_with_grass"},
+		place_on = {"default:dirt_with_rainforest_litter"},
 		sidelen = 80,
 		fill_ratio = 0.1,
 		biomes = {"rainforest"},

mods/default/nodes.lua

@@ -44,6 +44,7 @@ default:dirt_with_grass
 default:dirt_with_grass_footsteps
 default:dirt_with_dry_grass
 default:dirt_with_snow
+default:dirt_with_rainforest_litter
 
 default:sand
 default:desert_sand
@@ -386,6 +387,21 @@ minetest.register_node("default:dirt_with_snow", {
 	}),
 })
 
+minetest.register_node("default:dirt_with_rainforest_litter", {
+	description = "Dirt with Rainforest Litter",
+	tiles = {
+		"default_rainforest_litter.png",
+		"default_dirt.png",
+		{name = "default_dirt.png^default_rainforest_litter_side.png",
+			tileable_vertical = false}
+	},
+	groups = {crumbly = 3, soil = 1, spreading_dirt_type = 1},
+	drop = "default:dirt",
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name = "default_grass_footstep", gain = 0.4},
+	}),
+})
+
 minetest.register_node("default:sand", {
 	description = "Sand",
 	tiles = {"default_sand.png"},