Fix walls of underground. Add alien floor.

mapgen.lua

@@ -330,7 +330,10 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 						else
 							if biome == "control" then
 								data[ivm] = node(glass[3])
-							elseif biome ~= "underground" and dy < half then
+							elseif dy < half then
+								data[ivm] = node("loud_walking:scrith")
+								lightmap[ivm] = 0
+							elseif biome == "underground" then
 								data[ivm] = node("loud_walking:scrith")
 								lightmap[ivm] = 0
 							elseif dy == csize.y - 1 then
@@ -341,11 +344,11 @@ function loud_walking.generate(p_minp, p_maxp, seed)
 						end
 						in_cave = false
 					elseif biome == "control" and dy % 5 == 0 then
-						data[ivm] = node("default:steelblock")
+						data[ivm] = node("loud_walking:alien_floor")
 					elseif biome == "control" and (math.abs(dx - half) < 3 or math.abs(dz - half) < 3) then
 						data[ivm] = node("air")
 					elseif biome == "control" and ((math.abs(dx - half) % 20 == 3 and (math.abs(dz - half) - 12) % 20 > 3) or (math.abs(dz - half) % 20 == 3 and (math.abs(dx - half) - 12) % 20 > 3)) then
-						data[ivm] = node("default:steelblock")
+						data[ivm] = node("loud_walking:alien_floor")
 					elseif biome == "control" then
 						--
 					elseif (((dx == 35 or dx == 45) and dz >= 35 and dz <= 45) or ((dz == 35 or dz == 45) and dx >= 35 and dx <= 45)) and dx ~= 40 and dz ~= 40 and dy == csize.y - 2 then

nodes.lua

@@ -40,6 +40,16 @@ local node = loud_walking.clone_node("loud_walking:sky_scrith")
 node.tiles = {"loud_walking_glass_detail.png"}
 minetest.register_node("loud_walking:transparent_scrith", node)
 
+minetest.register_node("loud_walking:alien_floor", {
+	description = "Floor",
+	paramtype = "light",
+	tiles = {"loud_walking_alien_floor.png"},
+	use_texture_alpha = true,
+	is_ground_content = false,
+	groups = {},
+	sounds = default.node_sound_stone_defaults(),
+})
+
 minetest.register_node("loud_walking:controls", {
 	description = "Alien control system",
 	paramtype = "light",

textures/texture_licenses.txt

 The alien controls are based on a work by Steve LeMaster (http://obnoxiousnox.deviantart.com/art/Alien-control-panel-264724297), and used with permission.
+The alien floor is based on Piotr Siedlecki's work (http://www.publicdomainpictures.net/view-image.php?image=40539&picture=alien-wires-texture), in the public domain.