Declare variable.

mapgen.lua

@@ -10,6 +10,7 @@ local p2data = {}  -- vm rotation data buffer
 local lightmap = {}
 local vm, emin, emax, a, csize, heightmap, biomemap
 local div_sz_x, div_sz_z, minp, maxp, terrain, cave
+local cloud
 
 local terrain_noise = {offset = 0,
 scale = 20, seed = 8829, spread = {x = 40, y = 40, z = 40},
@@ -265,7 +266,7 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 		cave_lining = nil
 	end
 
-	print(biome)
+	--print(biome)
 	vm:set_lighting({day = 15, night = (biome == "control" and 15 or 0)}, minp, maxp)
 	lightmap = vm:get_light_data()