diff --git a/mods/default/crafting.lua b/mods/default/crafting.lua
index 6e51519..bb610b9 100644
--- a/mods/default/crafting.lua
+++ b/mods/default/crafting.lua
@@ -42,13 +42,6 @@ minetest.register_craft({
 	}
 })
 
-minetest.register_craft({
-	output = 'default:acacia_wood',
-	recipe = {
-		{'default:acacia_bush_stem'},
-	}
-})
-
 minetest.register_craft({
 	output = 'default:stick 4',
 	recipe = {
@@ -350,54 +343,6 @@ minetest.register_craft({
 	}
 })
 
-minetest.register_craft({
-	output = 'default:steelblock',
-	recipe = {
-		{'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
-		{'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
-		{'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:steel_ingot 9',
-	recipe = {
-		{'default:steelblock'},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:copperblock',
-	recipe = {
-		{'default:copper_ingot', 'default:copper_ingot', 'default:copper_ingot'},
-		{'default:copper_ingot', 'default:copper_ingot', 'default:copper_ingot'},
-		{'default:copper_ingot', 'default:copper_ingot', 'default:copper_ingot'},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:copper_ingot 9',
-	recipe = {
-		{'default:copperblock'},
-	}
-})
-
-minetest.register_craft({
-	output = "default:tinblock",
-	recipe = {
-		{"default:tin_ingot", "default:tin_ingot", "default:tin_ingot"},
-		{"default:tin_ingot", "default:tin_ingot", "default:tin_ingot"},
-		{"default:tin_ingot", "default:tin_ingot", "default:tin_ingot"},
-	}
-})
-
-minetest.register_craft({
-	output = "default:tin_ingot 9",
-	recipe = {
-		{"default:tinblock"},
-	}
-})
-
 minetest.register_craft({
 	output = "default:bronze_ingot 9",
 	recipe = {
@@ -407,54 +352,6 @@ minetest.register_craft({
 	}
 })
 
-minetest.register_craft({
-	output = 'default:bronzeblock',
-	recipe = {
-		{'default:bronze_ingot', 'default:bronze_ingot', 'default:bronze_ingot'},
-		{'default:bronze_ingot', 'default:bronze_ingot', 'default:bronze_ingot'},
-		{'default:bronze_ingot', 'default:bronze_ingot', 'default:bronze_ingot'},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:bronze_ingot 9',
-	recipe = {
-		{'default:bronzeblock'},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:goldblock',
-	recipe = {
-		{'default:gold_ingot', 'default:gold_ingot', 'default:gold_ingot'},
-		{'default:gold_ingot', 'default:gold_ingot', 'default:gold_ingot'},
-		{'default:gold_ingot', 'default:gold_ingot', 'default:gold_ingot'},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:gold_ingot 9',
-	recipe = {
-		{'default:goldblock'},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:diamondblock',
-	recipe = {
-		{'default:diamond', 'default:diamond', 'default:diamond'},
-		{'default:diamond', 'default:diamond', 'default:diamond'},
-		{'default:diamond', 'default:diamond', 'default:diamond'},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:diamond 9',
-	recipe = {
-		{'default:diamondblock'},
-	}
-})
-
 minetest.register_craft({
 	output = "default:sandstone",
 	recipe = {
@@ -590,15 +487,6 @@ minetest.register_craft({
 	}
 })
 
-minetest.register_craft({
-	output = 'default:ladder_steel 15',
-	recipe = {
-		{'default:steel_ingot', '', 'default:steel_ingot'},
-		{'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
-		{'default:steel_ingot', '', 'default:steel_ingot'},
-	}
-})
-
 minetest.register_craft({
 	output = 'default:mese',
 	recipe = {
@@ -631,56 +519,6 @@ minetest.register_craft({
 	}
 })
 
-minetest.register_craft({
-	output = 'default:meselamp',
-	recipe = {
-		{'default:glass'},
-		{'default:mese_crystal'},
-	}
-})
-
-minetest.register_craft({
-	output = "default:mese_post_light 3",
-	recipe = {
-		{"", "default:glass", ""},
-		{"default:mese_crystal", "default:mese_crystal", "default:mese_crystal"},
-		{"", "group:wood", ""},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:obsidian_shard 9',
-	recipe = {
-		{'default:obsidian'}
-	}
-})
-
-minetest.register_craft({
-	output = 'default:obsidian',
-	recipe = {
-		{'default:obsidian_shard', 'default:obsidian_shard', 'default:obsidian_shard'},
-		{'default:obsidian_shard', 'default:obsidian_shard', 'default:obsidian_shard'},
-		{'default:obsidian_shard', 'default:obsidian_shard', 'default:obsidian_shard'},
-	}
-})
-
-minetest.register_craft({
-	output = 'default:obsidianbrick 4',
-	recipe = {
-		{'default:obsidian', 'default:obsidian'},
-		{'default:obsidian', 'default:obsidian'}
-	}
-})
-
-minetest.register_craft({
-	output = 'default:obsidian_block 9',
-	recipe = {
-		{'default:obsidian', 'default:obsidian', 'default:obsidian'},
-		{'default:obsidian', 'default:obsidian', 'default:obsidian'},
-		{'default:obsidian', 'default:obsidian', 'default:obsidian'},
-	}
-})
-
 minetest.register_craft({
 	output = 'default:stonebrick 4',
 	recipe = {
@@ -749,12 +587,6 @@ minetest.register_craft({
 	recipe = "group:sand",
 })
 
-minetest.register_craft({
-	type = "cooking",
-	output = "default:obsidian_glass",
-	recipe = "default:obsidian_shard",
-})
-
 minetest.register_craft({
 	type = "cooking",
 	output = "default:stone",
diff --git a/mods/default/craftitems.lua b/mods/default/craftitems.lua
index 2b25f93..e4df7ef 100644
--- a/mods/default/craftitems.lua
+++ b/mods/default/craftitems.lua
@@ -81,8 +81,3 @@ minetest.register_craftitem("default:clay_brick", {
 	description = "Clay Brick",
 	inventory_image = "default_clay_brick.png",
 })
-
-minetest.register_craftitem("default:obsidian_shard", {
-	description = "Obsidian Shard",
-	inventory_image = "default_obsidian_shard.png",
-})
diff --git a/mods/default/functions.lua b/mods/default/functions.lua
index 9453379..e262b83 100644
--- a/mods/default/functions.lua
+++ b/mods/default/functions.lua
@@ -122,11 +122,7 @@ end
 --
 
 default.cool_lava = function(pos, node)
-	if node.name == "default:lava_source" then
-		minetest.set_node(pos, {name = "default:obsidian"})
-	else -- Lava flowing
-		minetest.set_node(pos, {name = "default:stone"})
-	end
+	minetest.set_node(pos, {name = "default:stone"})
 	minetest.sound_play("default_cool_lava",
 		{pos = pos, max_hear_distance = 16, gain = 0.25})
 end
diff --git a/mods/default/nodes.lua b/mods/default/nodes.lua
index cbe8b65..7418cf8 100644
--- a/mods/default/nodes.lua
+++ b/mods/default/nodes.lua
@@ -362,31 +362,6 @@ minetest.register_node("default:silver_sandstone_block", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
-minetest.register_node("default:obsidian", {
-	description = "Obsidian",
-	tiles = {"default_obsidian.png"},
-	sounds = default.node_sound_stone_defaults(),
-	groups = {cracky = 1, level = 2},
-})
-
-minetest.register_node("default:obsidianbrick", {
-	description = "Obsidian Brick",
-	paramtype2 = "facedir",
-	place_param2 = 0,
-	tiles = {"default_obsidian_brick.png"},
-	is_ground_content = false,
-	sounds = default.node_sound_stone_defaults(),
-	groups = {cracky = 1, level = 2},
-})
-
-minetest.register_node("default:obsidian_block", {
-	description = "Obsidian Block",
-	tiles = {"default_obsidian_block.png"},
-	is_ground_content = false,
-	sounds = default.node_sound_stone_defaults(),
-	groups = {cracky = 1, level = 2},
-})
-
 --
 -- Soft / Non-Stone
 --
@@ -410,18 +385,6 @@ minetest.register_node("default:dirt_with_grass", {
 	}),
 })
 
-minetest.register_node("default:dirt_with_grass_footsteps", {
-	description = "Dirt with Grass and Footsteps",
-	tiles = {"default_grass.png^default_footprint.png", "default_dirt.png",
-		{name = "default_dirt.png^default_grass_side.png",
-			tileable_vertical = false}},
-	groups = {crumbly = 3, soil = 1, not_in_creative_inventory = 1},
-	drop = 'default:dirt',
-	sounds = default.node_sound_dirt_defaults({
-		footstep = {name = "default_grass_footstep", gain = 0.25},
-	}),
-})
-
 minetest.register_node("default:dirt_with_dry_grass", {
 	description = "Dirt with Dry Grass",
 	tiles = {"default_dry_grass.png",
@@ -589,42 +552,6 @@ minetest.register_node("default:wood", {
 	sounds = default.node_sound_wood_defaults(),
 })
 
-minetest.register_node("default:sapling", {
-	description = "Sapling",
-	drawtype = "plantlike",
-	tiles = {"default_sapling.png"},
-	inventory_image = "default_sapling.png",
-	wield_image = "default_sapling.png",
-	paramtype = "light",
-	sunlight_propagates = true,
-	walkable = false,
-	on_timer = default.grow_sapling,
-	selection_box = {
-		type = "fixed",
-		fixed = {-4 / 16, -0.5, -4 / 16, 4 / 16, 7 / 16, 4 / 16}
-	},
-	groups = {snappy = 2, dig_immediate = 3, flammable = 2,
-		attached_node = 1, sapling = 1},
-	sounds = default.node_sound_leaves_defaults(),
-
-	on_construct = function(pos)
-		minetest.get_node_timer(pos):start(math.random(2400,4800))
-	end,
-
-	on_place = function(itemstack, placer, pointed_thing)
-		itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
-			"default:sapling",
-			-- minp, maxp to be checked, relative to sapling pos
-			-- minp_relative.y = 1 because sapling pos has been checked
-			{x = -2, y = 1, z = -2},
-			{x = 2, y = 6, z = 2},
-			-- maximum interval of interior volume check
-			4)
-
-		return itemstack
-	end,
-})
-
 minetest.register_node("default:leaves", {
 	description = "Leaves",
 	drawtype = "allfaces_optional",
@@ -634,21 +561,6 @@ minetest.register_node("default:leaves", {
 	paramtype = "light",
 	is_ground_content = false,
 	groups = {snappy = 3, leafdecay = 3, flammable = 2, leaves = 1},
-	drop = {
-		max_items = 1,
-		items = {
-			{
-				-- player will get sapling with 1/20 chance
-				items = {'default:sapling'},
-				rarity = 20,
-			},
-			{
-				-- player will get leaves only if he get no saplings,
-				-- this is because max_items is 1
-				items = {'default:leaves'},
-			}
-		}
-	},
 	sounds = default.node_sound_leaves_defaults(),
 
 	after_place_node = default.after_place_leaves,
@@ -711,54 +623,11 @@ minetest.register_node("default:jungleleaves", {
 	paramtype = "light",
 	is_ground_content = false,
 	groups = {snappy = 3, leafdecay = 3, flammable = 2, leaves = 1},
-	drop = {
-		max_items = 1,
-		items = {
-			{items = {'default:junglesapling'}, rarity = 20},
-			{items = {'default:jungleleaves'}}
-		}
-	},
 	sounds = default.node_sound_leaves_defaults(),
 
 	after_place_node = default.after_place_leaves,
 })
 
-minetest.register_node("default:junglesapling", {
-	description = "Jungle Sapling",
-	drawtype = "plantlike",
-	tiles = {"default_junglesapling.png"},
-	inventory_image = "default_junglesapling.png",
-	wield_image = "default_junglesapling.png",
-	paramtype = "light",
-	sunlight_propagates = true,
-	walkable = false,
-	on_timer = default.grow_sapling,
-	selection_box = {
-		type = "fixed",
-		fixed = {-4 / 16, -0.5, -4 / 16, 4 / 16, 7 / 16, 4 / 16}
-	},
-	groups = {snappy = 2, dig_immediate = 3, flammable = 2,
-		attached_node = 1, sapling = 1},
-	sounds = default.node_sound_leaves_defaults(),
-
-	on_construct = function(pos)
-		minetest.get_node_timer(pos):start(math.random(2400,4800))
-	end,
-
-	on_place = function(itemstack, placer, pointed_thing)
-		itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
-			"default:junglesapling",
-			-- minp, maxp to be checked, relative to sapling pos
-			-- minp_relative.y = 1 because sapling pos has been checked
-			{x = -2, y = 1, z = -2},
-			{x = 2, y = 15, z = 2},
-			-- maximum interval of interior volume check
-			4)
-
-		return itemstack
-	end,
-})
-
 
 minetest.register_node("default:pine_tree", {
 	description = "Pine Tree",
@@ -790,55 +659,11 @@ minetest.register_node("default:pine_needles",{
 	paramtype = "light",
 	is_ground_content = false,
 	groups = {snappy = 3, leafdecay = 3, flammable = 2, leaves = 1},
-	drop = {
-		max_items = 1,
-		items = {
-			{items = {"default:pine_sapling"}, rarity = 20},
-			{items = {"default:pine_needles"}}
-		}
-	},
 	sounds = default.node_sound_leaves_defaults(),
 
 	after_place_node = default.after_place_leaves,
 })
 
-minetest.register_node("default:pine_sapling", {
-	description = "Pine Sapling",
-	drawtype = "plantlike",
-	tiles = {"default_pine_sapling.png"},
-	inventory_image = "default_pine_sapling.png",
-	wield_image = "default_pine_sapling.png",
-	paramtype = "light",
-	sunlight_propagates = true,
-	walkable = false,
-	on_timer = default.grow_sapling,
-	selection_box = {
-		type = "fixed",
-		fixed = {-4 / 16, -0.5, -4 / 16, 4 / 16, 7 / 16, 4 / 16}
-	},
-	groups = {snappy = 2, dig_immediate = 3, flammable = 3,
-		attached_node = 1, sapling = 1},
-	sounds = default.node_sound_leaves_defaults(),
-
-	on_construct = function(pos)
-		minetest.get_node_timer(pos):start(math.random(2400,4800))
-	end,
-
-	on_place = function(itemstack, placer, pointed_thing)
-		itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
-			"default:pine_sapling",
-			-- minp, maxp to be checked, relative to sapling pos
-			-- minp_relative.y = 1 because sapling pos has been checked
-			{x = -2, y = 1, z = -2},
-			{x = 2, y = 12, z = 2},
-			-- maximum interval of interior volume check
-			4)
-
-		return itemstack
-	end,
-})
-
-
 minetest.register_node("default:acacia_tree", {
 	description = "Acacia Tree",
 	tiles = {"default_acacia_tree_top.png", "default_acacia_tree_top.png",
@@ -870,54 +695,11 @@ minetest.register_node("default:acacia_leaves", {
 	paramtype = "light",
 	is_ground_content = false,
 	groups = {snappy = 3, leafdecay = 3, flammable = 2, leaves = 1},
-	drop = {
-		max_items = 1,
-		items = {
-			{items = {"default:acacia_sapling"}, rarity = 20},
-			{items = {"default:acacia_leaves"}}
-		}
-	},
 	sounds = default.node_sound_leaves_defaults(),
 
 	after_place_node = default.after_place_leaves,
 })
 
-minetest.register_node("default:acacia_sapling", {
-	description = "Acacia Tree Sapling",
-	drawtype = "plantlike",
-	tiles = {"default_acacia_sapling.png"},
-	inventory_image = "default_acacia_sapling.png",
-	wield_image = "default_acacia_sapling.png",
-	paramtype = "light",
-	sunlight_propagates = true,
-	walkable = false,
-	on_timer = default.grow_sapling,
-	selection_box = {
-		type = "fixed",
-		fixed = {-4 / 16, -0.5, -4 / 16, 4 / 16, 7 / 16, 4 / 16}
-	},
-	groups = {snappy = 2, dig_immediate = 3, flammable = 2,
-		attached_node = 1, sapling = 1},
-	sounds = default.node_sound_leaves_defaults(),
-
-	on_construct = function(pos)
-		minetest.get_node_timer(pos):start(math.random(2400,4800))
-	end,
-
-	on_place = function(itemstack, placer, pointed_thing)
-		itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
-			"default:acacia_sapling",
-			-- minp, maxp to be checked, relative to sapling pos
-			-- minp_relative.y = 1 because sapling pos has been checked
-			{x = -4, y = 1, z = -4},
-			{x = 4, y = 6, z = 4},
-			-- maximum interval of interior volume check
-			4)
-
-		return itemstack
-	end,
-})
-
 minetest.register_node("default:aspen_tree", {
 	description = "Aspen Tree",
 	tiles = {"default_aspen_tree_top.png", "default_aspen_tree_top.png",
@@ -948,54 +730,11 @@ minetest.register_node("default:aspen_leaves", {
 	paramtype = "light",
 	is_ground_content = false,
 	groups = {snappy = 3, leafdecay = 3, flammable = 2, leaves = 1},
-	drop = {
-		max_items = 1,
-		items = {
-			{items = {"default:aspen_sapling"}, rarity = 20},
-			{items = {"default:aspen_leaves"}}
-		}
-	},
 	sounds = default.node_sound_leaves_defaults(),
 
 	after_place_node = default.after_place_leaves,
 })
 
-minetest.register_node("default:aspen_sapling", {
-	description = "Aspen Tree Sapling",
-	drawtype = "plantlike",
-	tiles = {"default_aspen_sapling.png"},
-	inventory_image = "default_aspen_sapling.png",
-	wield_image = "default_aspen_sapling.png",
-	paramtype = "light",
-	sunlight_propagates = true,
-	walkable = false,
-	on_timer = default.grow_sapling,
-	selection_box = {
-		type = "fixed",
-		fixed = {-3 / 16, -0.5, -3 / 16, 3 / 16, 0.5, 3 / 16}
-	},
-	groups = {snappy = 2, dig_immediate = 3, flammable = 3,
-		attached_node = 1, sapling = 1},
-	sounds = default.node_sound_leaves_defaults(),
-
-	on_construct = function(pos)
-		minetest.get_node_timer(pos):start(math.random(2400,4800))
-	end,
-
-	on_place = function(itemstack, placer, pointed_thing)
-		itemstack = default.sapling_on_place(itemstack, placer, pointed_thing,
-			"default:aspen_sapling",
-			-- minp, maxp to be checked, relative to sapling pos
-			-- minp_relative.y = 1 because sapling pos has been checked
-			{x = -2, y = 1, z = -2},
-			{x = 2, y = 12, z = 2},
-			-- maximum interval of interior volume check
-			4)
-
-		return itemstack
-	end,
-})
-
 --
 -- Ores
 --
@@ -1025,15 +764,6 @@ minetest.register_node("default:stone_with_iron", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
-minetest.register_node("default:steelblock", {
-	description = "Steel Block",
-	tiles = {"default_steel_block.png"},
-	is_ground_content = false,
-	groups = {cracky = 1, level = 2},
-	sounds = default.node_sound_metal_defaults(),
-})
-
-
 minetest.register_node("default:stone_with_copper", {
 	description = "Copper Ore",
 	tiles = {"default_stone.png^default_mineral_copper.png"},
@@ -1042,15 +772,6 @@ minetest.register_node("default:stone_with_copper", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
-minetest.register_node("default:copperblock", {
-	description = "Copper Block",
-	tiles = {"default_copper_block.png"},
-	is_ground_content = false,
-	groups = {cracky = 1, level = 2},
-	sounds = default.node_sound_metal_defaults(),
-})
-
-
 minetest.register_node("default:stone_with_tin", {
 	description = "Tin Ore",
 	tiles = {"default_stone.png^default_mineral_tin.png"},
@@ -1059,15 +780,6 @@ minetest.register_node("default:stone_with_tin", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
-minetest.register_node("default:tinblock", {
-	description = "Tin Block",
-	tiles = {"default_tin_block.png"},
-	is_ground_content = false,
-	groups = {cracky = 1, level = 2},
-	sounds = default.node_sound_metal_defaults(),
-})
-
-
 minetest.register_node("default:bronzeblock", {
 	description = "Bronze Block",
 	tiles = {"default_bronze_block.png"},
@@ -1076,7 +788,6 @@ minetest.register_node("default:bronzeblock", {
 	sounds = default.node_sound_metal_defaults(),
 })
 
-
 minetest.register_node("default:stone_with_mese", {
 	description = "Mese Ore",
 	tiles = {"default_stone.png^default_mineral_mese.png"},
@@ -1103,15 +814,6 @@ minetest.register_node("default:stone_with_gold", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
-minetest.register_node("default:goldblock", {
-	description = "Gold Block",
-	tiles = {"default_gold_block.png"},
-	is_ground_content = false,
-	groups = {cracky = 1},
-	sounds = default.node_sound_metal_defaults(),
-})
-
-
 minetest.register_node("default:stone_with_diamond", {
 	description = "Diamond Ore",
 	tiles = {"default_stone.png^default_mineral_diamond.png"},
@@ -1120,14 +822,6 @@ minetest.register_node("default:stone_with_diamond", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
-minetest.register_node("default:diamondblock", {
-	description = "Diamond Block",
-	tiles = {"default_diamond_block.png"},
-	is_ground_content = false,
-	groups = {cracky = 1, level = 3},
-	sounds = default.node_sound_stone_defaults(),
-})
-
 --
 -- Plantlife (non-cubic)
 --
@@ -1471,28 +1165,6 @@ minetest.register_node("default:ladder_wood", {
 	sounds = default.node_sound_wood_defaults(),
 })
 
-minetest.register_node("default:ladder_steel", {
-	description = "Steel Ladder",
-	drawtype = "signlike",
-	tiles = {"default_ladder_steel.png"},
-	inventory_image = "default_ladder_steel.png",
-	wield_image = "default_ladder_steel.png",
-	paramtype = "light",
-	paramtype2 = "wallmounted",
-	sunlight_propagates = true,
-	walkable = false,
-	climbable = true,
-	is_ground_content = false,
-	selection_box = {
-		type = "wallmounted",
-		--wall_top = = <default>
-		--wall_bottom = = <default>
-		--wall_side = = <default>
-	},
-	groups = {cracky = 2},
-	sounds = default.node_sound_metal_defaults(),
-})
-
 default.register_fence("default:fence_wood", {
 	description = "Wooden Fence",
 	texture = "default_fence_wood.png",
@@ -1555,19 +1227,6 @@ minetest.register_node("default:glass", {
 	sounds = default.node_sound_glass_defaults(),
 })
 
-minetest.register_node("default:obsidian_glass", {
-	description = "Obsidian Glass",
-	drawtype = "glasslike_framed_optional",
-	tiles = {"default_obsidian_glass.png", "default_obsidian_glass_detail.png"},
-	paramtype = "light",
-	paramtype2 = "glasslikeliquidlevel",
-	is_ground_content = false,
-	sunlight_propagates = true,
-	sounds = default.node_sound_glass_defaults(),
-	groups = {cracky = 3},
-})
-
-
 minetest.register_node("default:brick", {
 	description = "Brick Block",
 	paramtype2 = "facedir",
@@ -1578,7 +1237,6 @@ minetest.register_node("default:brick", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
-
 minetest.register_node("default:meselamp", {
 	description = "Mese Lamp",
 	drawtype = "glasslike",
@@ -1591,39 +1249,6 @@ minetest.register_node("default:meselamp", {
 	light_source = default.LIGHT_MAX,
 })
 
-minetest.register_node("default:mese_post_light", {
-	description = "Mese Post Light",
-	tiles = {"default_mese_post_light_top.png", "default_mese_post_light_top.png",
-		"default_mese_post_light_side_dark.png", "default_mese_post_light_side_dark.png",
-		"default_mese_post_light_side.png", "default_mese_post_light_side.png"},
-	wield_image = "default_mese_post_light_side.png",
-	drawtype = "nodebox",
-	node_box = {
-		type = "fixed",
-		fixed = {
-			{-2 / 16, -8 / 16, -2 / 16, 2 / 16, 8 / 16, 2 / 16},
-		},
-	},
-	paramtype = "light",
-	light_source = default.LIGHT_MAX,
-	sunlight_propagates = true,
-	is_ground_content = false,
-	groups = {choppy = 2, oddly_breakable_by_hand = 2, flammable = 2},
-	sounds = default.node_sound_wood_defaults(),
-})
-
---
--- Misc
---
-
-minetest.register_node("default:cloud", {
-	description = "Cloud",
-	tiles = {"default_cloud.png"},
-	is_ground_content = false,
-	sounds = default.node_sound_defaults(),
-	groups = {not_in_creative_inventory = 1},
-})
-
 --
 -- register trees for leafdecay
 --
diff --git a/mods/default/textures/default_obsidian.png b/mods/default/textures/default_obsidian.png
deleted file mode 100644
index 8f4a49c..0000000
Binary files a/mods/default/textures/default_obsidian.png and /dev/null differ
diff --git a/mods/default/textures/default_obsidian_block.png b/mods/default/textures/default_obsidian_block.png
deleted file mode 100644
index 7e1d4d3..0000000
Binary files a/mods/default/textures/default_obsidian_block.png and /dev/null differ
diff --git a/mods/default/textures/default_obsidian_brick.png b/mods/default/textures/default_obsidian_brick.png
deleted file mode 100644
index 30c67ca..0000000
Binary files a/mods/default/textures/default_obsidian_brick.png and /dev/null differ
diff --git a/mods/default/textures/default_obsidian_glass.png b/mods/default/textures/default_obsidian_glass.png
deleted file mode 100644
index d5ac83d..0000000
Binary files a/mods/default/textures/default_obsidian_glass.png and /dev/null differ
diff --git a/mods/default/textures/default_obsidian_glass_detail.png b/mods/default/textures/default_obsidian_glass_detail.png
deleted file mode 100644
index a8bbec9..0000000
Binary files a/mods/default/textures/default_obsidian_glass_detail.png and /dev/null differ
diff --git a/mods/default/textures/default_obsidian_shard.png b/mods/default/textures/default_obsidian_shard.png
deleted file mode 100644
index a988d8c..0000000
Binary files a/mods/default/textures/default_obsidian_shard.png and /dev/null differ
diff --git a/mods/doors/init.lua b/mods/doors/init.lua
index 7f19c4d..4607e21 100644
--- a/mods/doors/init.lua
+++ b/mods/doors/init.lua
@@ -463,21 +463,6 @@ doors.register("door_glass", {
 		}
 })
 
-doors.register("door_obsidian_glass", {
-		tiles = {"doors_door_obsidian_glass.png"},
-		description = "Obsidian Glass Door",
-		inventory_image = "doors_item_obsidian_glass.png",
-		groups = {cracky=3},
-		sounds = default.node_sound_glass_defaults(),
-		sound_open = "doors_glass_door_open",
-		sound_close = "doors_glass_door_close",
-		recipe = {
-			{"default:obsidian_glass", "default:obsidian_glass"},
-			{"default:obsidian_glass", "default:obsidian_glass"},
-			{"default:obsidian_glass", "default:obsidian_glass"},
-		},
-})
-
 -- Capture mods using the old API as best as possible.
 function doors.register_door(name, def)
 	if def.only_placer_can_open then
diff --git a/mods/stairs/init.lua b/mods/stairs/init.lua
index 419869f..84a9837 100644
--- a/mods/stairs/init.lua
+++ b/mods/stairs/init.lua
@@ -685,36 +685,6 @@ stairs.register_stair_and_slab(
 	default.node_sound_stone_defaults()
 )
 
-stairs.register_stair_and_slab(
-	"obsidian",
-	"default:obsidian",
-	{cracky = 1, level = 2},
-	{"default_obsidian.png"},
-	"Obsidian Stair",
-	"Obsidian Slab",
-	default.node_sound_stone_defaults()
-)
-
-stairs.register_stair_and_slab(
-	"obsidianbrick",
-	"default:obsidianbrick",
-	{cracky = 1, level = 2},
-	{"default_obsidian_brick.png"},
-	"Obsidian Brick Stair",
-	"Obsidian Brick Slab",
-	default.node_sound_stone_defaults()
-)
-
-stairs.register_stair_and_slab(
-	"obsidian_block",
-	"default:obsidian_block",
-	{cracky = 1, level = 2},
-	{"default_obsidian_block.png"},
-	"Obsidian Block Stair",
-	"Obsidian Block Slab",
-	default.node_sound_stone_defaults()
-)
-
 stairs.register_stair_and_slab(
 	"brick",
 	"default:brick",
@@ -725,56 +695,6 @@ stairs.register_stair_and_slab(
 	default.node_sound_stone_defaults()
 )
 
-stairs.register_stair_and_slab(
-	"steelblock",
-	"default:steelblock",
-	{cracky = 1, level = 2},
-	{"default_steel_block.png"},
-	"Steel Block Stair",
-	"Steel Block Slab",
-	default.node_sound_metal_defaults()
-)
-
-stairs.register_stair_and_slab(
-	"tinblock",
-	"default:tinblock",
-	{cracky = 1, level = 2},
-	{"default_tin_block.png"},
-	"Tin Block Stair",
-	"Tin Block Slab",
-	default.node_sound_metal_defaults()
-)
-
-stairs.register_stair_and_slab(
-	"copperblock",
-	"default:copperblock",
-	{cracky = 1, level = 2},
-	{"default_copper_block.png"},
-	"Copper Block Stair",
-	"Copper Block Slab",
-	default.node_sound_metal_defaults()
-)
-
-stairs.register_stair_and_slab(
-	"bronzeblock",
-	"default:bronzeblock",
-	{cracky = 1, level = 2},
-	{"default_bronze_block.png"},
-	"Bronze Block Stair",
-	"Bronze Block Slab",
-	default.node_sound_metal_defaults()
-)
-
-stairs.register_stair_and_slab(
-	"goldblock",
-	"default:goldblock",
-	{cracky = 1},
-	{"default_gold_block.png"},
-	"Gold Block Stair",
-	"Gold Block Slab",
-	default.node_sound_metal_defaults()
-)
-
 stairs.register_stair_and_slab(
 	"ice",
 	"default:ice",