Added savannah biome with acacia and dry grass

mapgen_v7n.lua

@@ -430,6 +430,18 @@ minetest.register_biome({
 	depth_filler = 5,
 	y_min = 3,
 	y_max = 25, -- was 61
+	heat_point = 65,
+	humidity_point = 25,
+})
+
+minetest.register_biome({
+	name = "savannah",
+	node_top = "default:dirt_with_dry_grass",
+	depth_top = 1,
+	node_filler = "default:dirt",
+	depth_filler = 5,
+	y_min = 3,
+	y_max = 50,
 	heat_point = 55,
 	humidity_point = 25,
 })
@@ -636,10 +648,10 @@ minetest.register_decoration({
 -- acacia tree
 minetest.register_decoration({
 	deco_type = "schematic",
-	place_on = {"default:desert_sand"},
+	place_on = {"default:desert_sand", "default:dirt_with_dry_grass"},
 	sidelen = 80,
 	fill_ratio = 0.004,
-	biomes = {"desert"},
+	biomes = {"desert", "savannah"},
 	schematic = path.."acaciatree.mts",
 	flags = "place_center_x, place_center_z",
 })
@@ -713,6 +725,19 @@ minetest.register_decoration({
 	decoration = "default:dry_shrub",
 })
 
+-- dry grass
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = {"default:dirt_with_dry_grass"},
+	sidelen = 80,
+	fill_ratio = 0.25,
+	biomes = {"savannah"},
+	decoration = {
+		"default:dry_grass_1", "default:dry_grass_2", "default:dry_grass_3",
+		"default:dry_grass_4", "default:dry_grass_5"
+	},
+})
+
 -- flowers & strawberry
 minetest.register_decoration({
 	deco_type = "simple",

plantlife.lua

@@ -423,15 +423,15 @@ minetest.register_craft({
 
 -- X pattern craft recipes (5x a in X pattern gives 5 b)
 for _,items in pairs({
-	{"cobble", "gravel"},
-	{"gravel", "dirt"},
-	{"dirt", "sand"},
-	{"ice", "snow"},
+	{"default:cobble", "default:gravel"},
+	{"default:gravel", "default:dirt"},
+	{"default:dirt", "default:sand"},
+	{"default:ice", "default:snow"},
+	{"ethereal:dry_dirt", "default:desert_sand"},
 }) do
 	local a,b = unpack(items)
-	a = "default:"..a
 	minetest.register_craft({
-		output = "default:"..b.." 5",
+		output = b.." 5",
 		recipe = {
 			{a, "", a},
 			{"", a, ""},