diff --git a/README.md b/README.md
index dbbe732..f1fc871 100644
--- a/README.md
+++ b/README.md
@@ -97,6 +97,11 @@ several examples are at the documentation of [api.txt](api.txt) file.
 A huge thanks to Chinchow who was the inspiration behind Ethereal and everyone
 who helped make this mod bigger and better throughout it's release :)
 
+### 1.32
+ - Add {eatable} groups to food items
+ - Use underground decoration placement for illumishrooms to improve performance
+ - Use worldalign textures for stairs
+
 ### 1.31
  - Fix fishing biome checks
  - Increase bamboo leaf decay radius
diff --git a/decor.lua b/decor.lua
index 9563e49..7ef39cc 100644
--- a/decor.lua
+++ b/decor.lua
@@ -757,9 +757,21 @@ if minetest.registered_nodes["default:coral_green"] then
 end
 
 
--- register async mapgen script
-if minetest.register_mapgen_script then
-	minetest.register_mapgen_script(minetest.get_modpath("ethereal") .. "/decor_on_generated.lua")
-else
-	dofile(minetest.get_modpath("ethereal") .. "/decor_on_generated.lua")
+-- illumishrooms using underground decoration placement
+local function add_illumishroom(low, high, nodename)
+
+	minetest.register_decoration({
+		deco_type = "simple",
+		place_on = {"default:stone_with_coal"},
+		sidelen = 16,
+		fill_ratio = 0.5,
+		y_max = high,
+		y_min = low,
+		flags = "force_placement, all_floors",
+		decoration = nodename
+	})
 end
+
+add_illumishroom(-1000, -30, "ethereal:illumishroom")
+add_illumishroom(-2000, -1000, "ethereal:illumishroom2")
+add_illumishroom(-3000, -2000, "ethereal:illumishroom3")
diff --git a/decor_on_generated.lua b/decor_on_generated.lua
deleted file mode 100644
index 455aa9e..0000000
--- a/decor_on_generated.lua
+++ /dev/null
@@ -1,39 +0,0 @@
-
-local random = math.random
-
--- Generate Illumishroom in caves on top of coal
-local function generate(minp, maxp)
-
-	if minp.y > -30 or maxp.y < -3000 then
-		return
-	end
-
-	local coal = minetest.find_nodes_in_area_under_air(
-			minp, maxp, "default:stone_with_coal")
-
-	for n = 1, #coal do
-
-		if random(2) == 1 then
-
-			local bpos = {x = coal[n].x, y = coal[n].y + 1, z = coal[n].z}
-
-			if bpos.y > -3000 and bpos.y < -2000 then
-				minetest.set_node(bpos, {name = "ethereal:illumishroom3"})
-			elseif bpos.y > -2000 and bpos.y < -1000 then
-				minetest.set_node(bpos, {name = "ethereal:illumishroom2"})
-			elseif bpos.y > -1000 and bpos.y < -30 then
-				minetest.set_node(bpos, {name = "ethereal:illumishroom"})
-			end
-		end
-	end
-end
-
-if minetest.save_gen_notify then -- async env (5.9+)
-	minetest.register_on_generated(function(vmanip, minp, maxp, blockseed)
-		generate(minp, maxp)
-	end)
-else -- main thread (5.8 and earlier)
-	minetest.register_on_generated(function(minp, maxp, blockseed)
-		generate(minp, maxp)
-	end)
-end
\ No newline at end of file