diff --git a/.luacheckrc b/.luacheckrc
index 0270997..cee9996 100644
--- a/.luacheckrc
+++ b/.luacheckrc
@@ -1,7 +1,6 @@
-unused_args = false
-allow_defined_top = true
 
 globals = {
+	"planet_mars",
 	"planetoids",
 	"vacuum",
 	"skybox"
diff --git a/init.lua b/init.lua
index 07c6bf9..40b0a98 100644
--- a/init.lua
+++ b/init.lua
@@ -21,5 +21,6 @@ dofile(MP.."/ores.lua")
 dofile(MP.."/mapgen.lua")
 dofile(MP.."/skybox.lua")
 dofile(MP.."/vacuum.lua")
+dofile(MP.."/marble.lua")
 
 print("[OK] Planet: mars (start: " .. planet_mars.y_start .. ", height:" .. planet_mars.y_height .. ")")
diff --git a/mapgen.lua b/mapgen.lua
index 2352e10..2651a6b 100644
--- a/mapgen.lua
+++ b/mapgen.lua
@@ -86,7 +86,7 @@ local mountain_perlin_map = {}
 local cave_perlin_map = {}
 local biome_perlin_map = {}
 
-minetest.register_on_generated(function(minp, maxp, seed)
+minetest.register_on_generated(function(minp, maxp)
 
 	if minp.y < y_start or minp.y > (y_start + y_height) then
 		-- not in range
diff --git a/marble.lua b/marble.lua
new file mode 100644
index 0000000..dfc5262
--- /dev/null
+++ b/marble.lua
@@ -0,0 +1,53 @@
+
+for _, color in ipairs({"red", "blue", "black"}) do
+
+	minetest.register_craft({
+		output = "planet_mars:" .. color .. "marble_polished",
+		recipe = {
+			{"planet_mars:" .. color .. "marble"},
+		}
+	})
+
+	minetest.register_craft({
+		output = "planet_mars:" .. color .. "marble_bricks 4",
+		recipe = {
+			{"planet_mars:" .. color .. "marble", "planet_mars:" .. color .. "marble"},
+			{"planet_mars:" .. color .. "marble", "planet_mars:" .. color .. "marble"},
+		}
+	})
+
+	minetest.register_node("planet_mars:" .. color .. "marble_polished", {
+		description = "polished " .. color .. " marble",
+		tiles = {"planet_mars_" .. color .. "marble_polished.png"},
+		is_ground_content = true,
+		groups = {cracky=3},
+		sounds = default.node_sound_stone_defaults(),
+	})
+
+	minetest.register_node("planet_mars:" .. color .. "marble_bricks", {
+		description = color .. " marble bricks",
+		tiles = {"planet_mars_" .. color .. "marble_bricks.png"},
+		is_ground_content = true,
+		groups = {cracky=3},
+		sounds = default.node_sound_stone_defaults(),
+	})
+
+	minetest.register_node("planet_mars:" .. color .. "marble", {
+		description = color .. " marble",
+		tiles = {"planet_mars_" .. color .. "marble.png"},
+		is_ground_content = true,
+		groups = {cracky=3},
+		sounds = default.node_sound_stone_defaults(),
+	})
+
+	minetest.register_ore({
+		ore_type       = "scatter",
+		ore            = "planet_mars:" .. color .. "marble",
+		wherein        = "default:desert_stone",
+		clust_scarcity = 7*7*7,
+		clust_num_ores = 5,
+		clust_size     = 5,
+		y_max          = planet_mars.y_start + planet_mars.y_height,
+		y_min          = planet_mars.y_start,
+	})
+end
diff --git a/readme.md b/readme.md
index cee85e4..f3413ac 100644
--- a/readme.md
+++ b/readme.md
@@ -4,3 +4,8 @@ Planet mars mod for minetest
 # Overview
 
 Mapgen defaults to y 5000 to 11	000
+
+
+# License
+
+* textures/planet_mars_*marble https://forum.minetest.net/viewtopic.php?t=12798
diff --git a/textures/planet_mars_blackmarble.png b/textures/planet_mars_blackmarble.png
new file mode 100644
index 0000000..83c3b6f
Binary files /dev/null and b/textures/planet_mars_blackmarble.png differ
diff --git a/textures/planet_mars_blackmarble_bricks.png b/textures/planet_mars_blackmarble_bricks.png
new file mode 100644
index 0000000..dbf0a8d
Binary files /dev/null and b/textures/planet_mars_blackmarble_bricks.png differ
diff --git a/textures/planet_mars_blackmarble_polished.png b/textures/planet_mars_blackmarble_polished.png
new file mode 100644
index 0000000..39d87ae
Binary files /dev/null and b/textures/planet_mars_blackmarble_polished.png differ
diff --git a/textures/planet_mars_bluemarble.png b/textures/planet_mars_bluemarble.png
new file mode 100644
index 0000000..5f5b529
Binary files /dev/null and b/textures/planet_mars_bluemarble.png differ
diff --git a/textures/planet_mars_bluemarble_bricks.png b/textures/planet_mars_bluemarble_bricks.png
new file mode 100644
index 0000000..5a478d8
Binary files /dev/null and b/textures/planet_mars_bluemarble_bricks.png differ
diff --git a/textures/planet_mars_bluemarble_polished.png b/textures/planet_mars_bluemarble_polished.png
new file mode 100644
index 0000000..4eb3f3e
Binary files /dev/null and b/textures/planet_mars_bluemarble_polished.png differ
diff --git a/textures/planet_mars_redmarble.png b/textures/planet_mars_redmarble.png
new file mode 100644
index 0000000..2d49d8c
Binary files /dev/null and b/textures/planet_mars_redmarble.png differ
diff --git a/textures/planet_mars_redmarble_bricks.png b/textures/planet_mars_redmarble_bricks.png
new file mode 100644
index 0000000..1efa28e
Binary files /dev/null and b/textures/planet_mars_redmarble_bricks.png differ
diff --git a/textures/planet_mars_redmarble_polished.png b/textures/planet_mars_redmarble_polished.png
new file mode 100644
index 0000000..fb59378
Binary files /dev/null and b/textures/planet_mars_redmarble_polished.png differ