diff --git a/depends.txt b/depends.txt
index b270b77..53fabe4 100644
--- a/depends.txt
+++ b/depends.txt
@@ -1,3 +1,4 @@
 default
 vacuum
 bedrock?
+skybox?
diff --git a/init.lua b/init.lua
index 964e3ef..50fe653 100644
--- a/init.lua
+++ b/init.lua
@@ -1,98 +1,10 @@
-local has_bedrock_mod = minetest.get_modpath("bedrock")
-
--- http://dev.minetest.net/PerlinNoiseMap
-
--- basic planet height noise
-local base_params = {
-   offset = 0,
-   scale = 1,
-   spread = {x=1024, y=512, z=1024},
-   seed = 3468584,
-   octaves = 5,
-   persist = 0.6
+planet_mars = {
+	-- technic EU storage value
+	y_start = tonumber(minetest.settings:get("planet_mars.y_start")) or 11000,
+	y_height = tonumber(minetest.settings:get("planet_mars.y_height")) or 500,
 }
 
--- ore params
-local ore_params = {
-   offset = 0,
-   scale = 1,
-   spread = {x=128, y=64, z=128},
-   seed = 935472,
-   octaves = 4,
-   persist = 0.6
-}
-
-local c_base = minetest.get_content_id("default:desert_stone")
-local c_air = minetest.get_content_id("air")
-local c_ignore = minetest.get_content_id("ignore")
-local c_vacuum = minetest.get_content_id("vacuum:vacuum")
-local c_clay = minetest.get_content_id("default:clay")
-local c_bedrock
-
-if has_bedrock_mod then
-	c_bedrock = minetest.get_content_id("bedrock:bedrock")
-end
-
-local y_min = 11000
-local y_max = 11280
-local y_diff = y_max - y_min
-
-
-minetest.register_on_generated(function(minp, maxp, seed)
-
-	if minp.y < y_min or minp.y > y_max then
-		return
-	end
-
-	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
-	local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
-	local data = vm:get_data()
-
-	local is_solid = minp.y < y_min+100
-
-	local side_length = maxp.x - minp.x + 1 -- 80
-	local map_lengths_xyz = {x=side_length, y=side_length, z=side_length}
-
-	local base_perlin_map = minetest.get_perlin_map(base_params, map_lengths_xyz):get3dMap_flat(minp)
-	local ore_perlin_map = minetest.get_perlin_map(ore_params, map_lengths_xyz):get3dMap_flat(minp)
-
-	local i = 1
-
-	for z=minp.z,maxp.z do
-	for y=minp.y,maxp.y do
-	for x=minp.x,maxp.x do
-
-		local index = area:index(x,y,z)
-
-		if y >= y_min and y < y_min+10 and has_bedrock_mod then
-			data[index] = c_bedrock
-
-		elseif data[index] == c_air or data[index] == c_vacuum or data[index] == c_ignore then
-			-- unpopulated node
-
-			-- higher elevation = lower chance
-			local chance = (y-minp.y) / side_length
-
-			local base_n = math.min(0, base_perlin_map[i] + 1)
-			local ore_n = ore_perlin_map[i]
-
-			if is_solid or base_n > chance then
-				-- basic material
-				data[index] = c_base
-			end
-		end
-
-		i = i + 1
-
-	end --x
-	end --y
-	end --z
- 
- 
-	vm:set_data(data)
-	vm:write_to_map()
-
-end)
-
+dofile(MP.."/mapgen.lua")
+dofile(MP.."/skybox.lua")
 
 print("[OK] Planet: mars")
diff --git a/mapgen.lua b/mapgen.lua
new file mode 100644
index 0000000..964e3ef
--- /dev/null
+++ b/mapgen.lua
@@ -0,0 +1,98 @@
+local has_bedrock_mod = minetest.get_modpath("bedrock")
+
+-- http://dev.minetest.net/PerlinNoiseMap
+
+-- basic planet height noise
+local base_params = {
+   offset = 0,
+   scale = 1,
+   spread = {x=1024, y=512, z=1024},
+   seed = 3468584,
+   octaves = 5,
+   persist = 0.6
+}
+
+-- ore params
+local ore_params = {
+   offset = 0,
+   scale = 1,
+   spread = {x=128, y=64, z=128},
+   seed = 935472,
+   octaves = 4,
+   persist = 0.6
+}
+
+local c_base = minetest.get_content_id("default:desert_stone")
+local c_air = minetest.get_content_id("air")
+local c_ignore = minetest.get_content_id("ignore")
+local c_vacuum = minetest.get_content_id("vacuum:vacuum")
+local c_clay = minetest.get_content_id("default:clay")
+local c_bedrock
+
+if has_bedrock_mod then
+	c_bedrock = minetest.get_content_id("bedrock:bedrock")
+end
+
+local y_min = 11000
+local y_max = 11280
+local y_diff = y_max - y_min
+
+
+minetest.register_on_generated(function(minp, maxp, seed)
+
+	if minp.y < y_min or minp.y > y_max then
+		return
+	end
+
+	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
+	local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
+	local data = vm:get_data()
+
+	local is_solid = minp.y < y_min+100
+
+	local side_length = maxp.x - minp.x + 1 -- 80
+	local map_lengths_xyz = {x=side_length, y=side_length, z=side_length}
+
+	local base_perlin_map = minetest.get_perlin_map(base_params, map_lengths_xyz):get3dMap_flat(minp)
+	local ore_perlin_map = minetest.get_perlin_map(ore_params, map_lengths_xyz):get3dMap_flat(minp)
+
+	local i = 1
+
+	for z=minp.z,maxp.z do
+	for y=minp.y,maxp.y do
+	for x=minp.x,maxp.x do
+
+		local index = area:index(x,y,z)
+
+		if y >= y_min and y < y_min+10 and has_bedrock_mod then
+			data[index] = c_bedrock
+
+		elseif data[index] == c_air or data[index] == c_vacuum or data[index] == c_ignore then
+			-- unpopulated node
+
+			-- higher elevation = lower chance
+			local chance = (y-minp.y) / side_length
+
+			local base_n = math.min(0, base_perlin_map[i] + 1)
+			local ore_n = ore_perlin_map[i]
+
+			if is_solid or base_n > chance then
+				-- basic material
+				data[index] = c_base
+			end
+		end
+
+		i = i + 1
+
+	end --x
+	end --y
+	end --z
+ 
+ 
+	vm:set_data(data)
+	vm:write_to_map()
+
+end)
+
+
+print("[OK] Planet: mars")
diff --git a/skybox.lua b/skybox.lua
new file mode 100644
index 0000000..9cf31f5
--- /dev/null
+++ b/skybox.lua
@@ -0,0 +1,28 @@
+local has_skybox_mod = minetest.get_modpath("skybox")
+
+if has_skybox_mod then
+	skybox.register({
+		-- http://www.custommapmakers.org/skyboxes.php
+		name = "mars",
+		miny = 11000,
+		maxy = 11999,
+		gravity = 0.37,
+		always_day = true,
+		clouds = {
+			thickness=16,
+			color={r=244, g=189, b=114, a=229},
+			ambient={r=0, g=0, b=0, a=255},
+			density=0.4,
+			height=11300,
+			speed={y=-2,x=0}
+		},
+		textures = {
+			"mars_up.jpg^[transformR270",
+			"mars_dn.jpg^[transformR90",
+			"mars_ft.jpg",
+			"mars_bk.jpg",
+			"mars_lf.jpg",
+			"mars_rt.jpg"
+		}
+	})
+end
diff --git a/textures/mars_bk.jpg b/textures/mars_bk.jpg
new file mode 100644
index 0000000..590f94a
Binary files /dev/null and b/textures/mars_bk.jpg differ
diff --git a/textures/mars_dn.jpg b/textures/mars_dn.jpg
new file mode 100644
index 0000000..2c47b12
Binary files /dev/null and b/textures/mars_dn.jpg differ
diff --git a/textures/mars_ft.jpg b/textures/mars_ft.jpg
new file mode 100644
index 0000000..cb5f43b
Binary files /dev/null and b/textures/mars_ft.jpg differ
diff --git a/textures/mars_lf.jpg b/textures/mars_lf.jpg
new file mode 100644
index 0000000..87ea74a
Binary files /dev/null and b/textures/mars_lf.jpg differ
diff --git a/textures/mars_rt.jpg b/textures/mars_rt.jpg
new file mode 100644
index 0000000..752a221
Binary files /dev/null and b/textures/mars_rt.jpg differ
diff --git a/textures/mars_up.jpg b/textures/mars_up.jpg
new file mode 100644
index 0000000..3dbc751
Binary files /dev/null and b/textures/mars_up.jpg differ