commit 7f7ca0fe7c386a1da660061ea6d59a4354bf4aa8
Author: ezhh <owlecho@live.com>
Date:   Fri Sep 23 20:59:15 2016 +0100

    First commit

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..0a85ca0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,30 @@
+Other Worlds 
+===
+
+Minetest mod which adds asteroid layers. 
+
+Each layer contains:
+1 - Asteroids composed of unique materials.
+2 - Decoration (or lack of) for the asteroid surfaces, included plants and glowing crystals. 
+3 - A skybox for the layer.
+
+Default layers are Space and Red Sky, but anyone familiar with editing mods should be able to easily adjust these or create different/ additional layers.
+
+
+Settings
+--------
+
+Settings for this mod can be adjusted by editing the settings.lua file. 
+
+See the comments in this file for how to adjust:
+1 - The minimum and maximum height of each layer.
+2 - Whether map-generation is currently active for individual layers.
+3 - Whether crafting recipes are enabled. 
+
+Note: It is advised to turn off map-generation after you have generated the required number of asteroids.
+
+
+Licenses and Attribution 
+-----------------------
+
+Components of this mod use multiple licenses and were the work of several individuals. Please see license.txt for the full list. 
diff --git a/asteroid_layer_helpers.lua b/asteroid_layer_helpers.lua
new file mode 100644
index 0000000..9bc854e
--- /dev/null
+++ b/asteroid_layer_helpers.lua
@@ -0,0 +1,274 @@
+
+-- submodule
+otherworlds.asteroids = {}
+
+-- Approximate realm limits.
+local XMIN = -33000
+local XMAX = 33000
+local ZMIN = -33000
+local ZMAX = 33000
+
+local ASCOT = 1.0 -- Large asteroid / comet nucleus noise threshold.
+local SASCOT = 1.0 -- Small asteroid / comet nucleus noise threshold.
+local STOT = 0.125 -- Asteroid stone threshold.
+local COBT = 0.05 -- Asteroid cobble threshold.
+local GRAT = 0.02 -- Asteroid gravel threshold.
+local ICET = 0.05 -- Comet ice threshold.
+local ATMOT = -0.2 -- Comet atmosphere threshold.
+local FISTS = 0.01 -- Fissure noise threshold at surface. Controls size of fissures and amount / size of fissure entrances.
+local FISEXP = 0.3 -- Fissure expansion rate under surface.
+local ORECHA = 3*3*3 -- Ore 1/x chance per stone node.
+local CPCHU = 0 -- Maximum craters per chunk.
+local CRMIN = 5 -- Crater radius minimum, radius includes dust and obsidian layers.
+local CRRAN = 8 -- Crater radius range.
+
+
+-- Note: for fewer large objects: increase the 'spread' numbers in 'np_large' noise parameters. For fewer small objects do the same in 'np_small'. Then tune size with 'ASCOT'.
+
+-- 3D Perlin noise 1 for large structures
+local np_large = {
+	offset = 0,
+	scale = 1,
+	spread = {x=256, y=128, z=256},
+	seed = -83928935,
+	octaves = 5,
+	persist = 0.6
+}
+
+-- 3D Perlin noise 3 for fissures
+local np_fissure = {
+	offset = 0,
+	scale = 1,
+	spread = {x=64, y=64, z=64},
+	seed = -188881,
+	octaves = 4,
+	persist = 0.5
+}
+
+-- 3D Perlin noise 4 for small structures
+local np_small = {
+	offset = 0,
+	scale = 1,
+	spread = {x=128, y=64, z=128},
+	seed = 1000760700090,
+	octaves = 4,
+	persist = 0.6
+}
+
+-- 3D Perlin noise 5 for ore selection
+local np_ores = {
+	offset = 0,
+	scale = 1,
+	spread = {x=128, y=128, z=128},
+	seed = -70242,
+	octaves = 1,
+	persist = 0.5
+}
+
+-- 3D Perlin noise 6 for comet atmosphere
+local np_latmos = {
+	offset = 0,
+	scale = 1,
+	spread = {x=256, y=128, z=256},
+	seed = -83928935,
+	octaves = 3,
+	persist = 0.6
+}
+
+-- 3D Perlin noise 7 for small comet atmosphere
+local np_satmos = {
+	offset = 0,
+	scale = 1,
+	spread = {x=128, y=64, z=128},
+	seed = 1000760700090,
+	octaves = 2,
+	persist = 0.6
+}
+
+-- Stuff
+
+
+-- On dignode function. Atmosphere flows into a dug hole.
+minetest.register_on_dignode(function(pos, oldnode, digger)
+	if minetest.find_node_near(pos, 1, {"other_worlds:atmos"}) then
+		minetest.set_node(pos, {name = "other_worlds:atmos"})
+	end
+end)
+
+-- Generate on_generated function based on parameters
+function otherworlds.asteroids.create_on_generated(ymin, ymax, content_ids)
+	local YMIN = ymin
+	local YMAX = ymax
+
+	local c_air = content_ids.c_air
+	local c_stone = content_ids.c_stone
+	local c_cobble = content_ids.c_cobble
+	local c_gravel = content_ids.c_gravel
+	local c_dust = content_ids.c_dust
+	local c_ironore = content_ids.c_ironore
+	local c_copperore = content_ids.c_copperore
+	local c_goldore = content_ids.c_goldore
+	local c_diamondore = content_ids.c_diamondore
+	local c_meseore = content_ids.c_meseore
+	local c_waterice = content_ids.c_waterice
+	local c_atmos = content_ids.c_atmos
+	local c_snowblock = content_ids.c_snowblock
+	local c_obsidian = content_ids.c_obsidian
+
+	-- return the function closed over the upvalues we want
+	return function(minp, maxp, seed)
+		if minp.x < XMIN or maxp.x > XMAX
+		or minp.y < YMIN or maxp.y > YMAX
+		or minp.z < ZMIN or maxp.z > ZMAX then
+			return
+		end
+		-- local t1 = os.clock()
+		local x1 = maxp.x
+		local y1 = maxp.y
+		local z1 = maxp.z
+		local x0 = minp.x
+		local y0 = minp.y
+		local z0 = minp.z
+		--print ("[asteroid] chunk ("..x0.." "..y0.." "..z0..")")
+		local sidelen = x1 - x0 + 1 -- chunk side length
+		--local vplanarea = sidelen ^ 2 -- vertical plane area, used if calculating noise index from x y z
+		local chulens = {x=sidelen, y=sidelen, z=sidelen}
+		local minpos = {x=x0, y=y0, z=z0}
+
+		local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
+		local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
+		local data = vm:get_data()
+
+		local nvals1 = minetest.get_perlin_map(np_large, chulens):get3dMap_flat(minpos)
+		local nvals3 = minetest.get_perlin_map(np_fissure, chulens):get3dMap_flat(minpos)
+		local nvals4 = minetest.get_perlin_map(np_small, chulens):get3dMap_flat(minpos)
+		local nvals5 = minetest.get_perlin_map(np_ores, chulens):get3dMap_flat(minpos)
+		local nvals6 = minetest.get_perlin_map(np_latmos, chulens):get3dMap_flat(minpos)
+		local nvals7 = minetest.get_perlin_map(np_satmos, chulens):get3dMap_flat(minpos)
+
+		local ni = 1
+		for z = z0, z1 do -- for each vertical plane do
+		for y = y0, y1 do -- for each horizontal row do
+		local vi = area:index(x0, y, z) -- LVM index for first node in x row
+		for x = x0, x1 do -- for each node do
+			local noise1abs = math.abs(nvals1[ni]) 
+			local noise4abs = math.abs(nvals4[ni]) 
+			local comet = false
+			if nvals6[ni] < -(ASCOT + ATMOT) or (nvals7[ni] < -(SASCOT + ATMOT) and nvals1[ni] < ASCOT) then 
+				comet = true -- comet biome
+			end
+			if noise1abs > ASCOT or noise4abs > SASCOT then -- if below surface then
+				local noise1dep = noise1abs - ASCOT -- noise1dep zero at surface, positive beneath
+				if math.abs(nvals3[ni]) > FISTS + noise1dep * FISEXP then -- if no fissure then
+					local noise4dep = noise4abs - SASCOT -- noise4dep zero at surface, positive beneath
+					if not comet or (comet and (noise1dep > math.random() + ICET or noise4dep > math.random() + ICET)) then
+						-- asteroid or asteroid materials in comet
+						if noise1dep >= STOT or noise4dep >= STOT then
+							-- stone/ores
+							if math.random(ORECHA) == 2 then
+								if nvals5[ni] > 0.6 then
+									data[vi] = c_goldore
+								elseif nvals5[ni] < -0.6 then
+									data[vi] = c_diamondore
+								elseif nvals5[ni] > 0.2 then
+									data[vi] = c_meseore
+								elseif nvals5[ni] < -0.2 then
+									data[vi] = c_copperore
+								else
+									data[vi] = c_ironore
+								end
+							else
+								data[vi] = c_stone
+							end
+						elseif noise1dep >= COBT or noise4dep >= COBT then
+							data[vi] = c_cobble
+						elseif noise1dep >= GRAT or noise4dep >= GRAT then
+							data[vi] = c_gravel
+						else
+							data[vi] = c_dust
+						end
+					else -- comet materials
+						if noise1dep >= ICET or noise4dep >= ICET then
+							data[vi] = c_waterice
+						else
+							data[vi] = c_snowblock
+						end
+					end
+				elseif comet then -- fissures, if comet then add comet atmosphere
+					data[vi] = c_atmos
+				end
+			elseif comet then -- if comet atmosphere then
+				data[vi] = c_atmos
+			end
+			ni = ni + 1
+			vi = vi + 1
+		end
+		end
+		end
+		-- craters
+		for ci = 1, CPCHU do -- iterate
+			local cr = CRMIN + math.floor(math.random() ^ 2 * CRRAN) -- exponential radius
+			local cx = math.random(minp.x + cr, maxp.x - cr) -- centre x
+			local cz = math.random(minp.z + cr, maxp.z - cr) -- centre z
+			local comet = false
+			local surfy = false
+			for y = y1, y0 + cr, -1 do
+				local vi = area:index(cx, y, cz) -- LVM index for node
+				local nodeid = data[vi]
+				if nodeid == c_dust
+				or nodeid == c_gravel
+				or nodeid == c_cobble then
+					surfy = y
+					break
+				elseif nodename == c_snowblock
+				or nodename == c_waterice then
+					comet = true
+					surfy = y
+					break
+				end
+			end
+			if surfy and y1 - surfy > 8 then -- if surface found and 8 node space above impact node then
+				for x = cx - cr, cx + cr do -- for each plane do
+					for z = cz - cr, cz + cr do -- for each column do
+						for y = surfy - cr, surfy + cr do -- for each node do
+							local vi = area:index(x, y, z) -- LVM index for node
+							local nr = ((x - cx) ^ 2 + (y - surfy) ^ 2 + (z - cz) ^ 2) ^ 0.5
+							if nr <= cr - 2 then
+								if comet then
+									data[vi] = c_atmos
+								else
+									data[vi] = c_air
+								end
+							elseif nr <= cr - 1 then
+								local nodeid = data[vi]
+								if nodeid == c_gravel
+								or nodeid == c_cobble
+								or nodeid == c_stone
+								or nodeid == c_diamondore
+								or nodeid == c_goldore
+								or nodeid == c_meseore
+								or nodeid == c_copperore
+								or nodeid == c_ironore then
+									data[vi] = c_dust
+								end
+							elseif nr <= cr then
+								local nodeid = data[vi]
+								if nodeid == c_cobble
+								or nodeid == c_stone then
+									data[vi] = c_obsidian -- obsidian buried under dust
+								end
+							end
+						end
+					end
+				end
+			end
+		end
+		vm:set_data(data)
+		vm:set_lighting({day=0, night=0})
+		vm:calc_lighting()
+		vm:write_to_map(data)
+		-- local chugent = math.ceil((os.clock() - t1) * 1000)
+		--print ("[asteroid] time "..chugent.." ms")
+		data = nil
+	end
+end
diff --git a/crafting.lua b/crafting.lua
new file mode 100644
index 0000000..e05d687
--- /dev/null
+++ b/crafting.lua
@@ -0,0 +1,45 @@
+if otherworlds.settings.crafting.enable then
+
+	minetest.register_craft({
+		output = "asteroid:cobble",
+		recipe = {
+			{"asteroid:stone"},
+		},
+	})
+
+	minetest.register_craft({
+		output = "asteroid:gravel",
+		recipe = {
+			{"asteroid:cobble"},
+		},
+	})
+
+	minetest.register_craft({
+		output = "asteroid:dust",
+		recipe = {
+			{"asteroid:gravel"},
+		},
+	})
+
+	minetest.register_craft({
+		output = "asteroid:redcobble",
+		recipe = {
+			{"asteroid:redstone"},
+		},
+	})
+
+	minetest.register_craft({
+		output = "asteroid:redgravel",
+		recipe = {
+			{"asteroid:redcobble"},
+		},
+	})
+
+	minetest.register_craft({
+		output = "asteroid:reddust",
+		recipe = {
+			{"asteroid:redgravel"},
+		},
+	})
+
+end
diff --git a/crystals.lua b/crystals.lua
new file mode 100644
index 0000000..43d902f
--- /dev/null
+++ b/crystals.lua
@@ -0,0 +1,50 @@
+
+local sbox = {
+	type = "fixed",
+	fixed = {-5/16, -8/16, -6/16, 5/16, -1/32, 5/16},
+}
+
+local crystal_list = {   
+	{"ghost_crystal", "ghost_crystal.png",},
+	{"red_crystal", "red_crystal.png",},
+	{"rose_quartz", "rose_quartz.png",},
+}
+
+for i in ipairs(crystal_list) do
+	local name = crystal_list[i][1]
+	local texture = crystal_list[i][2]
+
+	minetest.register_node(":crystals:"..name.."_1", {
+		description = "Glowing Crystal",
+		drawtype = "mesh",
+		mesh = "crystal_shape01.obj",
+		tiles = {"crystals_"..texture,},
+		paramtype = "light",
+		paramtype2 = "facedir",
+		selection_box = sbox,
+		walkable = false,
+		light_source = 10,
+		use_texture_alpha = true,
+		visual_scale = 10,
+		groups = {snappy=2,choppy=2,oddly_breakable_by_hand=3,},
+		sounds = default.node_sound_glass_defaults(),
+	})
+
+	minetest.register_node(":crystals:"..name.."_2", {
+		description = "Glowing Crystal",
+		drawtype = "mesh",
+		mesh = "crystal_shape02.obj",
+		tiles = {"crystals_"..texture,},
+		paramtype = "light",
+		paramtype2 = "facedir",
+		selection_box = sbox,
+		walkable = false,
+		light_source = 10,
+		use_texture_alpha = true,
+		visual_scale = 10,
+		groups = {snappy=2,choppy=2,oddly_breakable_by_hand=3,},
+		sounds = default.node_sound_glass_defaults(),
+	})
+end
+
+
diff --git a/depends.txt b/depends.txt
new file mode 100644
index 0000000..4ad96d5
--- /dev/null
+++ b/depends.txt
@@ -0,0 +1 @@
+default
diff --git a/init.lua b/init.lua
new file mode 100644
index 0000000..74c3e5d
--- /dev/null
+++ b/init.lua
@@ -0,0 +1,13 @@
+local modpath = minetest.get_modpath("other_worlds").. DIR_DELIM
+
+otherworlds = {}
+
+dofile(modpath .. "settings.lua")
+dofile(modpath .. "mars_plants.lua")
+dofile(modpath .. "crystals.lua")
+dofile(modpath .. "space_nodes.lua")
+dofile(modpath .. "crafting.lua") 
+dofile(modpath .. "skybox.lua")
+dofile(modpath .. "asteroid_layer_helpers.lua") -- required helpers for mapgen options below
+dofile(modpath .. "space_asteroids.lua") 
+dofile(modpath .. "redsky_asteroids.lua") 
diff --git a/license.txt b/license.txt
new file mode 100644
index 0000000..0bc29b1
--- /dev/null
+++ b/license.txt
@@ -0,0 +1,40 @@
+
+
+Original asteroids code:
+License: MIT (https://opensource.org/licenses/MIT)
+By paramat (available from https://github.com/paramat/asteroid)
+
+Original asteroid_ textures:
+License: CC BY-SA 3.0 (https://creativecommons.org/licenses/by/3.0/)
+Attribution: paramat
+
+Crystal models:
+License: MIT (https://opensource.org/licenses/MIT)
+By Electra Gizen
+
+Skybox texture:
+License: CC BY-SA 3.0 (https://creativecommons.org/licenses/by/3.0/)
+Attribution: Ulukai (available from http://opengameart.org/content/ulukais-space-skyboxes) 
+
+
+---
+
+Recoloured textures from various mods:
+Grass textures based on default mod in minetest_game (WTFPL). 
+Redgrass texture based on junglegrass texture in default mod in minetest_game (assumed to be CC BY-SA 3.0).
+Red versions of asteroid textures (CC BY-SA 3.0).
+
+
+---
+
+Textures created for this mod:
+CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/)
+Attribution: Shara RedCat
+
+All original code and edits to code for this mod:
+License: MIT (https://opensource.org/licenses/MIT)
+By Shara RedCat, tenplus1 and Mewmon
+
+---
+
+Thanks also to DonBatman for help with the initial idea, and to the players of Red Cat Creative who gave ideas and helped in testing.
\ No newline at end of file
diff --git a/mars_plants.lua b/mars_plants.lua
new file mode 100644
index 0000000..46d18d9
--- /dev/null
+++ b/mars_plants.lua
@@ -0,0 +1,111 @@
+minetest.register_node(":mars:redgrass", {
+	description = "Red Grass",
+	drawtype = "plantlike",
+	waving = 1,
+	visual_scale = 1.3,
+	tiles = {"mars_redgrass.png"},
+	inventory_image = "mars_redgrass.png",
+	wield_image = "mars_redgrass.png",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	buildable_to = true,
+	groups = {snappy=3,flora=1,attached_node=1},
+	sounds = default.node_sound_leaves_defaults(),
+	selection_box = {
+		type = "fixed",
+		fixed = {-0.5, -0.5, -0.5, 0.5, -5/16, 0.5},
+	},
+})
+
+minetest.register_node(":mars:redweed", {
+	description = "Red Weed",
+	drawtype = "plantlike",
+	waving = 1,
+	visual_scale = 1.3,
+	tiles = {"mars_redweed.png"},
+	inventory_image = "mars_redweed.png",
+	wield_image = "mars_redweed.png",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	buildable_to = true,
+	groups = {snappy=3,flora=1,attached_node=1},
+	sounds = default.node_sound_leaves_defaults(),
+	selection_box = {
+		type = "fixed",
+		fixed = {-0.5, -0.5, -0.5, 0.5, -5/16, 0.5},
+	},
+})
+
+minetest.register_node(":mars:moss", {
+	description = "Martian Moss",
+	drawtype = "nodebox",
+	tiles = {"mars_moss.png"},
+	inventory_image = "mars_moss.png",
+	wield_image = "mars_moss.png",
+	paramtype = "light",
+	paramtype2 = "facedir",
+	sunlight_propagates = true,
+	walkable = false,
+	node_box = {
+		type = "fixed", 
+		fixed = {-1/2, -1/2, -1/2, 1/2, -15/32, 1/2},
+	},
+	selection_box = {
+		type = "fixed", 
+		fixed = {-1/2, -1/2, -1/2, 1/2, -15/32, 1/2},
+	},
+	groups = {snappy=3,flora=1,attached_node=1},
+	sounds = default.node_sound_leaves_defaults(),
+})
+
+
+--mars grass
+minetest.register_node(":mars:grass_1", {
+	description = "Martian Grass",
+	drawtype = "plantlike",
+	waving = 1,
+	tiles = {"mars_grass_1.png"},
+	inventory_image = "mars_grass_3.png",
+	wield_image = "mars_grass_3.png",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	buildable_to = true,
+	groups = {snappy=3,flora=1,attached_node=1},
+	sounds = default.node_sound_leaves_defaults(),
+	selection_box = {
+		type = "fixed",
+		fixed = {-0.5, -0.5, -0.5, 0.5, -5/16, 0.5},
+	},
+
+	on_place = function(itemstack, placer, pointed_thing)
+		-- place a random grass node
+		local stack = ItemStack("mars:grass_"..math.random(1,5))
+		local ret = minetest.item_place(stack, placer, pointed_thing)
+		return ItemStack("mars:grass_1 "..itemstack:get_count()-(1-ret:get_count()))
+	end,
+})
+
+for i=2,5 do
+	minetest.register_node(":mars:grass_"..i, {
+		description = "Martian Grass",
+		drawtype = "plantlike",
+		waving = 1,
+		tiles = {"mars_grass_"..i..".png"},
+		inventory_image = "mars_grass_"..i..".png",
+		wield_image = "mars_grass_"..i..".png",
+		paramtype = "light",
+		sunlight_propagates = true,
+		walkable = false,
+		buildable_to = true,
+		drop = "mars:grass_1",
+		groups = {snappy=3,flora=1,attached_node=1,not_in_creative_inventory=1},
+		sounds = default.node_sound_leaves_defaults(),
+		selection_box = {
+			type = "fixed",
+			fixed = {-0.5, -0.5, -0.5, 0.5, -5/16, 0.5},
+		},
+	})
+end
\ No newline at end of file
diff --git a/models/crystal_shape01.obj b/models/crystal_shape01.obj
new file mode 100644
index 0000000..0614004
--- /dev/null
+++ b/models/crystal_shape01.obj
@@ -0,0 +1,228 @@
+# Blender v2.77 (sub 0) OBJ File: ''
+# www.blender.org
+mtllib crystal_shape01.mtl
+o Crystal_Taya1.001
+v 0.019427 0.022291 -0.013603
+v 0.012823 0.031159 -0.009449
+v 0.013985 0.030045 -0.009115
+v 0.008443 0.038346 -0.005912
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diff --git a/models/crystal_shape02.obj b/models/crystal_shape02.obj
new file mode 100644
index 0000000..0b92b90
--- /dev/null
+++ b/models/crystal_shape02.obj
@@ -0,0 +1,198 @@
+# Blender v2.77 (sub 0) OBJ File: ''
+# www.blender.org
+mtllib crystal_shape02.mtl
+o Crystal_Taya2.000
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diff --git a/redsky_asteroids.lua b/redsky_asteroids.lua
new file mode 100644
index 0000000..188a375
--- /dev/null
+++ b/redsky_asteroids.lua
@@ -0,0 +1,76 @@
+if otherworlds.settings.redsky_asteroids.enable then
+
+	-- Approximate realm limits
+	local YMIN = otherworlds.settings.redsky_asteroids.YMIN or 6000
+	local YMAX = otherworlds.settings.redsky_asteroids.YMAX or 7000
+
+	-- Register on_generated function for this layer
+
+	minetest.register_on_generated(otherworlds.asteroids.create_on_generated(YMIN, YMAX, {
+		c_air = minetest.get_content_id("air"),
+		c_obsidian = minetest.get_content_id("default:obsidian"),
+		c_stone = minetest.get_content_id("asteroid:redstone"),
+		c_cobble = minetest.get_content_id("air"),
+		c_gravel = minetest.get_content_id("asteroid:redgravel"),
+		c_dust = minetest.get_content_id("asteroid:reddust"),
+		c_ironore = minetest.get_content_id("asteroid:ironore"),
+		c_copperore = minetest.get_content_id("asteroid:copperore"),
+		c_goldore = minetest.get_content_id("asteroid:goldore"),
+		c_diamondore = minetest.get_content_id("asteroid:diamondore"),
+		c_meseore = minetest.get_content_id("asteroid:meseore"),
+		c_waterice = minetest.get_content_id("default:ice"),
+		c_atmos = minetest.get_content_id("asteroid:atmos"),
+		c_snowblock = minetest.get_content_id("default:snowblock"),
+	}))
+
+
+	-- Deco code for grass and crystal
+
+	local TOPDECO = 500 -- how often surface decoration appears on top of asteroid cobble
+
+	local grass = {
+		"mars:grass_1", "mars:grass_2", "mars:grass_3",
+		"mars:grass_4", "mars:grass_5"
+	}
+	local flower = {
+		"mars:moss", "mars:redweed", "mars:redgrass"
+	}
+	local crystal = {
+		"crystals:ghost_crystal_1", "crystals:ghost_crystal_2", 
+		"crystals:red_crystal_1", "crystals:red_crystal_2", 
+		"crystals:rose_quartz_1", "crystals:rose_quartz_2", 
+	}
+
+	-- Add surface decoration
+	minetest.register_on_generated(function(minp, maxp)
+
+		if minp.y < YMIN or maxp.y > YMAX then
+			return
+		end
+
+		local bpos, ran
+		local coal = minetest.find_nodes_in_area_under_air(minp, maxp,
+			{"asteroid:redgravel"})
+
+		for n = 1, #coal do
+
+			bpos = {x = coal[n].x, y = coal[n].y + 1, z = coal[n].z }
+
+			ran = math.random(TOPDECO)
+
+			if ran < 100 then -- grass
+
+				minetest.swap_node(bpos, {name = grass[ math.random(1, #grass) ] })
+
+			elseif ran >= 180 and ran <= 200 then -- other plants
+
+				minetest.swap_node(bpos, {name = flower[ math.random(1, #flower) ] })
+
+			elseif ran == TOPDECO then -- crystals
+
+				minetest.swap_node(bpos, {name = crystal[ math.random(1, #crystal) ] })
+			end
+		end
+	end)
+
+end
diff --git a/settings.lua b/settings.lua
new file mode 100644
index 0000000..b7ca87e
--- /dev/null
+++ b/settings.lua
@@ -0,0 +1,21 @@
+otherworlds.settings = {}
+
+-- general
+otherworlds.settings.crafting = {
+	enable = true, --set to false to remove crafting recipes
+}
+
+-- space_asteroids
+otherworlds.settings.space_asteroids = {
+	enable = true, -- set to false to prevent space mapgen
+	YMIN = 5000,
+	YMAX = 6000,
+}
+
+
+-- redsky_asteroids
+otherworlds.settings.redsky_asteroids = {
+	enable = true, -- set to false to prevent redsky mapgen
+	YMIN = 6000,
+	YMAX = 7000,
+}
\ No newline at end of file
diff --git a/skybox.lua b/skybox.lua
new file mode 100644
index 0000000..3cc4df0
--- /dev/null
+++ b/skybox.lua
@@ -0,0 +1,75 @@
+--Heights for skyboxes
+local space_low = 5000 
+local space_high = 5999
+local redsky_low = 6000
+local redsky_high = 6999
+
+
+local player_list = {} -- Holds name of skybox showing for each player
+
+--Outerspace skybox
+local spaceskybox = {
+	"sky_pos_z.png",
+	"sky_neg_z.png^[transformR180",
+	"sky_neg_y.png^[transformR270",
+	"sky_pos_y.png^[transformR270",
+	"sky_pos_x.png^[transformR270",
+	"sky_neg_x.png^[transformR90",
+}
+
+--Redsky skybox
+local redskybox = {
+	"sky_pos_z.png^[colorize:#99000050",
+	"sky_neg_z.png^[transformR180^[colorize:#99000050",
+	"sky_neg_y.png^[transformR270^[colorize:#99000050",
+	"sky_pos_y.png^[transformR270^[colorize:#99000050",
+	"sky_pos_x.png^[transformR270^[colorize:#99000050",
+	"sky_neg_x.png^[transformR90^[colorize:#99000050",
+}
+
+
+local timer = 0
+
+minetest.register_globalstep(function(dtime)
+
+	timer = timer + dtime
+
+	if timer < 2 then
+		return
+	end
+
+	timer = 0
+
+	for _, player in pairs(minetest.get_connected_players()) do
+
+		local name = player:get_player_name()
+		local pos = player:getpos()
+		local current = player_list[name] or ""
+
+		-- Earth
+		if pos.y < space_low and current ~= "earth" then
+			player:set_sky({}, "regular", {})
+			player_list[name] = "earth"
+
+		-- Outerspace
+		elseif pos.y > space_low and pos.y < space_high and current ~= "space" then
+			player:set_sky({}, "skybox", spaceskybox)
+			player_list[name] = "space"
+
+		-- Redsky
+		elseif pos.y > redsky_low and pos.y < redsky_high and current ~= "redsky" then
+			player:set_sky({}, "skybox", redskybox)
+			player_list[name] = "redsky"		
+
+		-- Everything else (blackness)
+		elseif pos.y > redsky_high and current ~= "blackness" then
+			player:set_sky(000000, "plain", {})
+			player_list[name] = "blackness"
+		end
+	end
+end)
+
+minetest.register_on_leaveplayer(function(player)
+	local name = player:get_player_name()
+	player_list[name] = nil
+end)
diff --git a/space_asteroids.lua b/space_asteroids.lua
new file mode 100644
index 0000000..e6467b0
--- /dev/null
+++ b/space_asteroids.lua
@@ -0,0 +1,26 @@
+if otherworlds.settings.space_asteroids.enable then
+
+	-- Approximate realm limits
+	local YMIN = otherworlds.settings.space_asteroids.YMIN or 5000
+	local YMAX = otherworlds.settings.space_asteroids.YMAX or 6000
+
+	-- Register on_generated function for this layer
+
+	minetest.register_on_generated(otherworlds.asteroids.create_on_generated(YMIN, YMAX, {
+		c_air = minetest.get_content_id("air"),
+		c_obsidian = minetest.get_content_id("default:obsidian"),
+		c_stone = minetest.get_content_id("asteroid:stone"),
+		c_cobble = minetest.get_content_id("asteroid:cobble"),
+		c_gravel = minetest.get_content_id("asteroid:gravel"),
+		c_dust = minetest.get_content_id("asteroid:dust"),
+		c_ironore = minetest.get_content_id("default:stone_with_iron"),
+		c_copperore = minetest.get_content_id("default:stone_with_copper"),
+		c_goldore = minetest.get_content_id("default:stone_with_gold"),
+		c_diamondore = minetest.get_content_id("default:stone_with_diamond"),
+		c_meseore = minetest.get_content_id("default:stone_with_messe"),
+		c_waterice = minetest.get_content_id("default:ice"),
+		c_atmos = minetest.get_content_id("asteroid:atmos"),
+		c_snowblock = minetest.get_content_id("default:snowblock"),
+	}))
+	
+end
diff --git a/space_nodes.lua b/space_nodes.lua
new file mode 100644
index 0000000..a71df5c
--- /dev/null
+++ b/space_nodes.lua
@@ -0,0 +1,136 @@
+-- Nodes
+
+minetest.register_node(":asteroid:stone", {
+	description = "Asteroid Stone",
+	tiles = {"default_stone.png"},
+	is_ground_content = false,
+	drop = 'asteroid:cobble',
+	groups = {cracky = 3, not_in_creative_inventory=1},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node(":asteroid:redstone", {
+	description = "Asteroid Stone",
+	tiles = {"asteroid_redstone.png"},
+	is_ground_content = false,
+	drop = 'asteroid:redcobble',
+	groups = {cracky = 3},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node(":asteroid:cobble", {
+	description = "Asteroid Cobble",
+	tiles = {"asteroid_cobble.png"},
+	is_ground_content = false,
+	groups = {cracky = 3},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node(":asteroid:redcobble", {
+	description = "Asteroid Cobble",
+	tiles = {"asteroid_redcobble.png"},
+	is_ground_content = false,
+	groups = {cracky = 3},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node(":asteroid:gravel", {
+	description = "Asteroid gravel",
+	tiles = {"asteroid_gravel.png"},
+	is_ground_content = false,
+	groups = {crumbly = 2},
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name = "default_gravel_footstep", gain = 0.2},
+	}),
+})
+
+minetest.register_node(":asteroid:redgravel", {
+	description = "Asteroid gravel",
+	tiles = {"asteroid_redgravel.png"},
+	is_ground_content = false,
+	groups = {crumbly = 2},
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name = "default_gravel_footstep", gain = 0.2},
+	}),
+})
+
+minetest.register_node(":asteroid:dust", {
+	description = "Asteroid Dust",
+	tiles = {"asteroid_dust.png"},
+	is_ground_content = false,
+	groups = {crumbly = 3},
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name = "default_gravel_footstep", gain = 0.1},
+	}),
+})
+
+minetest.register_node(":asteroid:reddust", {
+	description = "Asteroid Dust",
+	tiles = {"asteroid_reddust.png"},
+	is_ground_content = false,
+	groups = {crumbly = 3},
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name = "default_gravel_footstep", gain = 0.1},
+	}),
+})
+
+minetest.register_node(":asteroid:ironore", {
+	description = "Asteroid Iron Ore",
+	tiles = {"asteroid_redstone.png^default_mineral_iron.png"},
+	is_ground_content = false,
+	groups = {cracky = 2},
+	drop = "default:iron_lump",
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node(":asteroid:copperore", {
+	description = "Asteroid Copper Ore",
+	tiles = {"asteroid_redstone.png^default_mineral_copper.png"},
+	is_ground_content = false,
+	groups = {cracky = 2},
+	drop = "default:copper_lump",
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node(":asteroid:goldore", {
+	description = "Asteroid Gold Ore",
+	tiles = {"asteroid_redstone.png^default_mineral_gold.png"},
+	is_ground_content = false,
+	groups = {cracky = 2},
+	drop = "default:gold_lump",
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node(":asteroid:diamondore", {
+	description = "Asteroid Diamond Ore",
+	tiles = {"asteroid_redstone.png^default_mineral_diamond.png"},
+	is_ground_content = false,
+	groups = {cracky = 1},
+	drop = "default:diamond",
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node(":asteroid:meseore", {
+	description = "Asteroid Mese Ore",
+	tiles = {"asteroid_redstone.png^default_mineral_mese.png"},
+	is_ground_content = false,
+	groups = {cracky = 1},
+	drop = "default:mese_crystal",
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_node(":asteroid:atmos", {
+	description = "Comet Atmosphere",
+	drawtype = "glasslike",
+	tiles = {"asteroid_atmos.png"},
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	buildable_to = true,
+	is_ground_content = false,
+	use_texture_alpha = true,
+	post_effect_color = {a = 31, r = 241, g = 248, b = 255},
+	groups = {not_in_creative_inventory = 1},
+})
diff --git a/textures/asteroid_atmos.png b/textures/asteroid_atmos.png
new file mode 100644
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diff --git a/textures/asteroid_cobble.png b/textures/asteroid_cobble.png
new file mode 100644
index 0000000..056e1b2
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diff --git a/textures/asteroid_dust.png b/textures/asteroid_dust.png
new file mode 100644
index 0000000..553928c
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diff --git a/textures/asteroid_gravel.png b/textures/asteroid_gravel.png
new file mode 100644
index 0000000..4638d7d
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diff --git a/textures/asteroid_redcobble.png b/textures/asteroid_redcobble.png
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diff --git a/textures/asteroid_reddust.png b/textures/asteroid_reddust.png
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diff --git a/textures/asteroid_redgravel.png b/textures/asteroid_redgravel.png
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diff --git a/textures/asteroid_redstone.png b/textures/asteroid_redstone.png
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diff --git a/textures/crystals_ghost_crystal.png b/textures/crystals_ghost_crystal.png
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index 0000000..1754a0f
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diff --git a/textures/crystals_red_crystal.png b/textures/crystals_red_crystal.png
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diff --git a/textures/crystals_rose_quartz.png b/textures/crystals_rose_quartz.png
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diff --git a/textures/mars_grass_1.png b/textures/mars_grass_1.png
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diff --git a/textures/mars_moss.png b/textures/mars_moss.png
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diff --git a/textures/mars_redgrass.png b/textures/mars_redgrass.png
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diff --git a/textures/mars_redweed.png b/textures/mars_redweed.png
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index 0000000..88e1e34
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diff --git a/textures/sky_neg_x.png b/textures/sky_neg_x.png
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