diff --git a/mods/ctf/ctf_map/ctf_map_core/nodes.lua b/mods/ctf/ctf_map/ctf_map_core/nodes.lua
index c446752..472b71b 100644
--- a/mods/ctf/ctf_map/ctf_map_core/nodes.lua
+++ b/mods/ctf/ctf_map/ctf_map_core/nodes.lua
@@ -76,814 +76,42 @@ do
 	})
 end
 
--- Indestructible nodes from MTG's default mod
-do
-	-- Stone
-
-	minetest.register_node(":ctf_map:stone", {
-		description = "Indestructible Stone",
-		tiles = {"default_stone.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:cobble", {
-		description = "Indestructible Cobblestone",
-		tiles = {"default_cobble.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:stonebrick", {
-		description = "Indestructible Stone Brick",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_stone_brick.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:stone_block", {
-		description = "Indestructible Stone Block",
-		tiles = {"default_stone_block.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:mossycobble", {
-		description = "Indestructible Mossy Cobblestone",
-		tiles = {"default_mossycobble.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-
-	minetest.register_node(":ctf_map:desert_stone", {
-		description = "Indestructible Desert Stone",
-		tiles = {"default_desert_stone.png"},
-		groups = {immortal = 1},
-
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:desert_cobble", {
-		description = "Indestructible Desert Cobblestone",
-		tiles = {"default_desert_cobble.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:desert_stonebrick", {
-		description = "Indestructible Desert Stone Brick",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_desert_stone_brick.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:desert_stone_block", {
-		description = "Indestructible Desert Stone Block",
-		tiles = {"default_desert_stone_block.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:sandstone", {
-		description = "Indestructible Sandstone",
-		tiles = {"default_sandstone.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:sandstonebrick", {
-		description = "Indestructible Sandstone Brick",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_sandstone_brick.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:sandstone_block", {
-		description = "Indestructible Sandstone Block",
-		tiles = {"default_sandstone_block.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:desert_sandstone", {
-		description = "Indestructible Desert Sandstone",
-		tiles = {"default_desert_sandstone.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:desert_sandstone_brick", {
-		description = "Indestructible Desert Sandstone Brick",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_desert_sandstone_brick.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:desert_sandstone_block", {
-		description = "Indestructible Desert Sandstone Block",
-		tiles = {"default_desert_sandstone_block.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:silver_sandstone", {
-		description = "Indestructible Silver Sandstone",
-		tiles = {"default_silver_sandstone.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:silver_sandstone_brick", {
-		description = "Indestructible Silver Sandstone Brick",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_silver_sandstone_brick.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:silver_sandstone_block", {
-		description = "Indestructible Silver Sandstone Block",
-		tiles = {"default_silver_sandstone_block.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	-- Soft / Non-Stone
-
-	minetest.register_node(":ctf_map:dirt", {
-		description = "Indestructible Dirt",
-		tiles = {"default_dirt.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_dirt_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:dirt_with_grass", {
-		description = "Indestructible Dirt with Grass",
-		tiles = {"default_grass.png", "default_dirt.png",
-			{name = "default_dirt.png^default_grass_side.png",
-				tileable_vertical = false}},
-		groups = {immortal = 1},
-
-		sounds = default.node_sound_dirt_defaults({
-			footstep = {name = "default_grass_footstep", gain = 0.25},
-		}),
-	})
-
-	minetest.register_node(":ctf_map:dirt_with_dry_grass", {
-		description = "Indestructible Dirt with Dry Grass",
-		tiles = {"default_dry_grass.png",
-			"default_dirt.png",
-			{name = "default_dirt.png^default_dry_grass_side.png",
-				tileable_vertical = false}},
-		groups = {immortal = 1},
-
-		sounds = default.node_sound_dirt_defaults({
-			footstep = {name = "default_grass_footstep", gain = 0.4},
-		}),
-	})
-
-	minetest.register_node(":ctf_map:dirt_with_snow", {
-		description = "Indestructible Dirt with Snow",
-		tiles = {"default_snow.png", "default_dirt.png",
-			{name = "default_dirt.png^default_snow_side.png",
-				tileable_vertical = false}},
-		groups = {immortal = 1},
-
-		sounds = default.node_sound_dirt_defaults({
-			footstep = {name = "default_snow_footstep", gain = 0.15},
-		}),
-	})
-
-	minetest.register_node(":ctf_map:dirt_with_rainforest_litter", {
-		description = "Indestructible Dirt with Rainforest Litter",
-		tiles = {
-			"default_rainforest_litter.png",
-			"default_dirt.png",
-			{name = "default_dirt.png^default_rainforest_litter_side.png",
-				tileable_vertical = false}
-		},
-		groups = {immortal = 1},
-
-		sounds = default.node_sound_dirt_defaults({
-			footstep = {name = "default_grass_footstep", gain = 0.4},
-		}),
-	})
-
-	minetest.register_node(":ctf_map:sand", {
-		description = "Indestructible Sand",
-		tiles = {"default_sand.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_sand_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:desert_sand", {
-		description = "Indestructible Desert Sand",
-		tiles = {"default_desert_sand.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_sand_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:silver_sand", {
-		description = "Indestructible Silver Sand",
-		tiles = {"default_silver_sand.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_sand_defaults(),
-	})
-
-
-	minetest.register_node(":ctf_map:gravel", {
-		description = "Indestructible Gravel",
-		tiles = {"default_gravel.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_gravel_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:clay", {
-		description = "Indestructible Clay",
-		tiles = {"default_clay.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_dirt_defaults(),
-	})
-
-
-	minetest.register_node(":ctf_map:snow", {
-		description = "Indestructible Snow",
-		tiles = {"default_snow.png"},
-		inventory_image = "default_snowball.png",
-		wield_image = "default_snowball.png",
-		paramtype = "light",
-		buildable_to = true,
-		floodable = true,
-		drawtype = "nodebox",
-		node_box = {
-			type = "fixed",
-			fixed = {
-				{-0.5, -0.5, -0.5, 0.5, -0.25, 0.5},
-			},
-		},
-		groups = {immortal = 1},
-		sounds = default.node_sound_dirt_defaults({
-			footstep = {name = "default_snow_footstep", gain = 0.15},
-			dug = {name = "default_snow_footstep", gain = 0.2},
-			dig = {name = "default_snow_footstep", gain = 0.2}
-		})
-	})
-
-	minetest.register_node(":ctf_map:snowblock", {
-		description = "Indestructible Snow Block",
-		tiles = {"default_snow.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_dirt_defaults({
-			footstep = {name = "default_snow_footstep", gain = 0.15},
-			dug = {name = "default_snow_footstep", gain = 0.2},
-			dig = {name = "default_snow_footstep", gain = 0.2}
-		})
-	})
-
-	minetest.register_node(":ctf_map:ice", {
-		description = "Indestructible Ice",
-		tiles = {"default_ice.png"},
-		is_ground_content = false,
-		paramtype = "light",
-		groups = {immortal = 1, slippery = 4},
-		sounds = default.node_sound_glass_defaults(),
-	})
-
-	-- Trees
-
-	minetest.register_node(":ctf_map:tree", {
-		description = "Indestructible Tree",
-		tiles = {"default_tree_top.png", "default_tree_top.png", "default_tree.png"},
-		paramtype2 = "facedir",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-		on_place = minetest.rotate_node
-	})
-
-	minetest.register_node(":ctf_map:wood", {
-		description = "Indestructible Wooden Planks",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_wood.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:leaves", {
-		description = "Indestructible Leaves",
-		drawtype = "allfaces_optional",
-		waving = 1,
-		tiles = {"default_leaves.png"},
-		special_tiles = {"default_leaves_simple.png"},
-		paramtype = "light",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_leaves_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:apple", {
-		description = "Indestructible Apple",
-		drawtype = "plantlike",
-		tiles = {"default_apple.png"},
-		inventory_image = "default_apple.png",
-		stack_max = 99,
-		paramtype = "light",
-		sunlight_propagates = true,
-		walkable = false,
-		is_ground_content = false,
-		selection_box = {
-			type = "fixed",
-			fixed = {-3 / 16, -7 / 16, -3 / 16, 3 / 16, 4 / 16, 3 / 16}
-		},
-		groups = {immortal = 1},
-		sounds = default.node_sound_leaves_defaults()
-	})
-
-	minetest.register_node(":ctf_map:papyrus", {
-		description = "Indestructible Papyrus",
-		drawtype = "plantlike",
-		tiles = {"default_papyrus.png"},
-		inventory_image = "default_papyrus.png",
-		wield_image = "default_papyrus.png",
-		paramtype = "light",
-		sunlight_propagates = true,
-		walkable = false,
-		selection_box = {
-			type = "fixed",
-			fixed = {-6 / 16, -0.5, -6 / 16, 6 / 16, 0.5, 6 / 16},
-		},
-		groups = {immortal = 1},
-		sounds = default.node_sound_leaves_defaults(),
-		after_dig_node = function(pos, node, metadata, digger)
-			default.dig_up(pos, node, digger)
-		end,
-	})
-
-	minetest.register_node(":ctf_map:jungletree", {
-		description = "Indestructible Jungle Tree",
-		tiles = {"default_jungletree_top.png", "default_jungletree_top.png",
-			"default_jungletree.png"},
-		paramtype2 = "facedir",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-		on_place = minetest.rotate_node
-	})
-
-	minetest.register_node(":ctf_map:junglewood", {
-		description = "Indestructible Jungle Wood Planks",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_junglewood.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:jungleleaves", {
-		description = "Indestructible Jungle Leaves",
-		drawtype = "allfaces_optional",
-		waving = 1,
-		tiles = {"default_jungleleaves.png"},
-		special_tiles = {"default_jungleleaves_simple.png"},
-		paramtype = "light",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_leaves_defaults(),
-	})
-
-
-	minetest.register_node(":ctf_map:pine_tree", {
-		description = "Indestructible Pine Tree",
-		tiles = {"default_pine_tree_top.png", "default_pine_tree_top.png",
-			"default_pine_tree.png"},
-		paramtype2 = "facedir",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-		on_place = minetest.rotate_node
-	})
-
-	minetest.register_node(":ctf_map:pine_wood", {
-		description = "Indestructible Pine Wood Planks",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_pine_wood.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:pine_needles",{
-		description = "Indestructible Pine Needles",
-		drawtype = "allfaces_optional",
-		tiles = {"default_pine_needles.png"},
-		waving = 1,
-		paramtype = "light",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_leaves_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:acacia_tree", {
-		description = "Indestructible Acacia Tree",
-		tiles = {"default_acacia_tree_top.png", "default_acacia_tree_top.png",
-			"default_acacia_tree.png"},
-		paramtype2 = "facedir",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-		on_place = minetest.rotate_node
-	})
-
-	minetest.register_node(":ctf_map:acacia_wood", {
-		description = "Indestructible Acacia Wood Planks",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_acacia_wood.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:acacia_leaves", {
-		description = "Indestructible Acacia Leaves",
-		drawtype = "allfaces_optional",
-		tiles = {"default_acacia_leaves.png"},
-		special_tiles = {"default_acacia_leaves_simple.png"},
-		waving = 1,
-		paramtype = "light",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_leaves_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:aspen_tree", {
-		description = "Indestructible Aspen Tree",
-		tiles = {"default_aspen_tree_top.png", "default_aspen_tree_top.png",
-			"default_aspen_tree.png"},
-		paramtype2 = "facedir",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-		on_place = minetest.rotate_node
-	})
-
-	minetest.register_node(":ctf_map:aspen_wood", {
-		description = "Indestructible Aspen Wood Planks",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_aspen_wood.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:aspen_leaves", {
-		description = "Indestructible Aspen Leaves",
-		drawtype = "allfaces_optional",
-		tiles = {"default_aspen_leaves.png"},
-		waving = 1,
-		paramtype = "light",
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_leaves_defaults(),
-	})
-
-	--
-	-- Ores
-	--
-
-	minetest.register_node(":ctf_map:stone_with_coal", {
-		description = "Indestructible Coal Ore",
-		tiles = {"default_stone.png^default_mineral_coal.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:coalblock", {
-		description = "Indestructible Coal Block",
-		tiles = {"default_coal_block.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-
-	minetest.register_node(":ctf_map:stone_with_iron", {
-		description = "Indestructible Iron Ore",
-		tiles = {"default_stone.png^default_mineral_iron.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:stone_with_copper", {
-		description = "Indestructible Copper Ore",
-		tiles = {"default_stone.png^default_mineral_copper.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:stone_with_tin", {
-		description = "Indestructible Tin Ore",
-		tiles = {"default_stone.png^default_mineral_tin.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:bronzeblock", {
-		description = "Indestructible Bronze Block",
-		tiles = {"default_bronze_block.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_metal_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:stone_with_mese", {
-		description = "Indestructible Mese Ore",
-		tiles = {"default_stone.png^default_mineral_mese.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:mese", {
-		description = "Indestructible Mese Block",
-		tiles = {"default_mese_block.png"},
-		paramtype = "light",
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-		light_source = 3,
-	})
-
-	minetest.register_node(":ctf_map:stone_with_diamond", {
-		description = "Indestructible Diamond Ore",
-		tiles = {"default_stone.png^default_mineral_diamond.png"},
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	-- Plantlife (non-cubic)
-
-	minetest.register_node(":ctf_map:cactus", {
-		description = "Indestructible Cactus",
-		tiles = {"default_cactus_top.png", "default_cactus_top.png",
-			"default_cactus_side.png"},
-		paramtype2 = "facedir",
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults(),
-		on_place = minetest.rotate_node,
-	})
-
-	minetest.register_node(":ctf_map:ladder_wood", {
-		description = "Indestructible Wooden Ladder",
-		drawtype = "signlike",
-		tiles = {"default_ladder_wood.png"},
-		inventory_image = "default_ladder_wood.png",
-		wield_image = "default_ladder_wood.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 = {immortal = 1},
-		legacy_wallmounted = true,
-		sounds = default.node_sound_wood_defaults(),
-	})
-
-	default.register_fence(":ctf_map:fence_wood", {
-		description = "Indestructible Wooden Fence",
-		texture = "default_fence_wood.png",
-		inventory_image = "default_fence_overlay.png^default_wood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		wield_image = "default_fence_overlay.png^default_wood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		material = "ctf_map:wood",
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults()
-	})
-
-	default.register_fence(":ctf_map:fence_acacia_wood", {
-		description = "Indestructible Acacia Fence",
-		texture = "default_fence_acacia_wood.png",
-		inventory_image = "default_fence_overlay.png^default_acacia_wood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		wield_image = "default_fence_overlay.png^default_acacia_wood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		material = "ctf_map:acacia_wood",
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults()
-	})
-
-	default.register_fence(":ctf_map:fence_junglewood", {
-		description = "Indestructible Jungle Wood Fence",
-		texture = "default_fence_junglewood.png",
-		inventory_image = "default_fence_overlay.png^default_junglewood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		wield_image = "default_fence_overlay.png^default_junglewood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		material = "ctf_map:junglewood",
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults()
-	})
-
-	default.register_fence(":ctf_map:fence_pine_wood", {
-		description = "Indestructible Pine Fence",
-		texture = "default_fence_pine_wood.png",
-		inventory_image = "default_fence_overlay.png^default_pine_wood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		wield_image = "default_fence_overlay.png^default_pine_wood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		material = "ctf_map:pine_wood",
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults()
-	})
-
-	default.register_fence(":ctf_map:fence_aspen_wood", {
-		description = "Indestructible Aspen Fence",
-		texture = "default_fence_aspen_wood.png",
-		inventory_image = "default_fence_overlay.png^default_aspen_wood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		wield_image = "default_fence_overlay.png^default_aspen_wood.png^default_fence_overlay.png^[makealpha:255,126,126",
-		material = "ctf_map:aspen_wood",
-		groups = {immortal = 1},
-		sounds = default.node_sound_wood_defaults()
-	})
-
-	minetest.register_node(":ctf_map:glass", {
-		description = "Indestructible Glass",
-		drawtype = "glasslike_framed_optional",
-		tiles = {"default_glass.png", "default_glass_detail.png"},
-		paramtype = "light",
-		paramtype2 = "glasslikeliquidlevel",
-		sunlight_propagates = true,
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_glass_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:brick", {
-		description = "Indestructible Brick Block",
-		paramtype2 = "facedir",
-		place_param2 = 0,
-		tiles = {"default_brick.png"},
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_stone_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:meselamp", {
-		description = "Indestructible Mese Lamp",
-		drawtype = "glasslike",
-		tiles = {"default_meselamp.png"},
-		paramtype = "light",
-		sunlight_propagates = true,
-		is_ground_content = false,
-		groups = {immortal = 1},
-		sounds = default.node_sound_glass_defaults(),
-		light_source = default.LIGHT_MAX,
-	})
+local mod_prefixes = {
+	default = "";
+	stairs = "";
+	wool = "wool_";
+}
+
+-- See Lua API, section "Node-only groups"
+local preserved_groups = {
+	bouncy = true;
+	connect_to_raillike = true;
+	disable_jump = true;
+	fall_damage_add_percent = true;
+	slippery = true;
+}
+
+local function make_immortal(def)
+	local groups = {immortal = 1}
+	for group in pairs(preserved_groups) do
+		groups[group] = def.groups[group]
+	end
+	def.groups = groups
+	def.floodable = false
+	def.description = def.description and ("Indestructible " .. def.description)
 end
 
--- Indestructible torches from MTG's default mod
-do
-	minetest.register_node(":ctf_map:torch", {
-		description = "Torch",
-		drawtype = "mesh",
-		mesh = "torch_floor.obj",
-		inventory_image = "default_torch_on_floor.png",
-		wield_image = "default_torch_on_floor.png",
-		tiles = {{
-			name = "default_torch_on_floor_animated.png",
-			animation = {type = "vertical_frames", aspect_w = 16, aspect_h = 16, length = 3.3}
-		}},
-		paramtype = "light",
-		paramtype2 = "wallmounted",
-		sunlight_propagates = true,
-		walkable = false,
-		liquids_pointable = false,
-		light_source = 12,
-		groups = {attached_node = 1, torch = 1},
-		drop = "ctf_map:torch",
-		selection_box = {
-			type = "wallmounted",
-			wall_bottom = {-1/8, -1/2, -1/8, 1/8, 2/16, 1/8},
-		},
-		sounds = default.node_sound_wood_defaults(),
-		on_place = function(itemstack, placer, pointed_thing)
-			local under = pointed_thing.under
-			local node = minetest.get_node(under)
-			local def = minetest.registered_nodes[node.name]
-			if def and def.on_rightclick and
-				not (placer and placer:is_player() and
-				placer:get_player_control().sneak) then
-				return def.on_rightclick(under, node, placer, itemstack,
-					pointed_thing) or itemstack
-			end
-
-			local above = pointed_thing.above
-			local wdir = minetest.dir_to_wallmounted(vector.subtract(under, above))
-			local fakestack = itemstack
-			if wdir == 0 then
-				fakestack:set_name(":ctf_map:torch_ceiling")
-			elseif wdir == 1 then
-				fakestack:set_name(":ctf_map:torch")
-			else
-				fakestack:set_name(":ctf_map:torch_wall")
-			end
-
-			itemstack = minetest.item_place(fakestack, placer, pointed_thing, wdir)
-			itemstack:set_name(":ctf_map:torch")
-
-			return itemstack
-		end,
-	})
-
-	minetest.register_node(":ctf_map:torch_wall", {
-		drawtype = "mesh",
-		mesh = "torch_wall.obj",
-		tiles = {{
-			name = "default_torch_on_floor_animated.png",
-			animation = {type = "vertical_frames", aspect_w = 16, aspect_h = 16, length = 3.3}
-		}},
-		paramtype = "light",
-		paramtype2 = "wallmounted",
-		sunlight_propagates = true,
-		walkable = false,
-		light_source = 12,
-		groups = {not_in_creative_inventory = 1, attached_node = 1, torch = 1},
-		drop = "ctf_map:torch",
-		selection_box = {
-			type = "wallmounted",
-			wall_side = {-1/2, -1/2, -1/8, -1/8, 1/8, 1/8},
-		},
-		sounds = default.node_sound_wood_defaults(),
-	})
-
-	minetest.register_node(":ctf_map:torch_ceiling", {
-		drawtype = "mesh",
-		mesh = "torch_ceiling.obj",
-		tiles = {{
-			name = "default_torch_on_floor_animated.png",
-			animation = {type = "vertical_frames", aspect_w = 16, aspect_h = 16, length = 3.3}
-		}},
-		paramtype = "light",
-		paramtype2 = "wallmounted",
-		sunlight_propagates = true,
-		walkable = false,
-		light_source = 12,
-		groups = {immortal = 1, not_in_creative_inventory = 1, attached_node = 1, torch = 1},
-		drop = "ctf_map:torch",
-		selection_box = {
-			type = "wallmounted",
-			wall_top = {-1/8, -1/16, -5/16, 1/8, 1/2, 1/8},
-		},
-		sounds = default.node_sound_wood_defaults(),
-	})
-end
-
--- Register indestructible variants of nodes from MTGs' stairs and wool mods
-do
-	local nodes = table.copy(minetest.registered_nodes)
-	for name, nodedef in pairs(nodes) do
-		if name:find("stairs") then
-			nodedef = table.copy(nodedef)
-			if nodedef.description then
-				nodedef.description = "Indestructible " .. nodedef.description
-			end
-			nodedef.groups = {immortal = 1}
-			minetest.register_node(":ctf_map:" .. name:split(":")[2], nodedef)
-		elseif name:find("wool") then
-			local color = name:split(":")[2]
-			nodedef = table.copy(nodedef)
-			if nodedef.description then
-				nodedef.description = "Indestructible " .. nodedef.description
-			end
-			nodedef.groups = {immortal = 1}
-			minetest.register_node(":ctf_map:wool_" .. color, nodedef)
-			minetest.register_alias("ctf_map:" .. color, "ctf_map:wool_" .. color)
+for name, def in pairs(minetest.registered_nodes) do
+	local mod, nodename = name:match"(..-):(.+)"
+	local prefix = mod_prefixes[mod]
+	if nodename and prefix and not (def.buildable_to or (def.groups and (def.groups.immortal or def.groups.mortal))) then
+		-- HACK to preserve backwards compatibility
+		local new_name = ":ctf_map:" .. prefix .. nodename
+		local new_def = table.copy(def)
+		if def.drop == name then
+			new_def.drop = new_name
 		end
+		make_immortal(new_def)
+		minetest.register_node(new_name, new_def)
 	end
 end
diff --git a/mods/mtg/default/torch.lua b/mods/mtg/default/torch.lua
index 5de5f89..37d393a 100644
--- a/mods/mtg/default/torch.lua
+++ b/mods/mtg/default/torch.lua
@@ -13,105 +13,88 @@ local function on_flood(pos, oldnode, newnode)
 	return false
 end
 
-minetest.register_node("default:torch", {
-	description = "Torch",
-	drawtype = "mesh",
-	mesh = "torch_floor.obj",
-	inventory_image = "default_torch_on_floor.png",
-	wield_image = "default_torch_on_floor.png",
-	tiles = {{
-		    name = "default_torch_on_floor_animated.png",
-		    animation = {type = "vertical_frames", aspect_w = 16, aspect_h = 16, length = 3.3}
-	}},
-	paramtype = "light",
-	paramtype2 = "wallmounted",
-	sunlight_propagates = true,
-	walkable = false,
-	liquids_pointable = false,
-	light_source = 12,
-	groups = {choppy=2, dig_immediate=3, flammable=1, attached_node=1, torch=1},
-	drop = "default:torch",
-	selection_box = {
-		type = "wallmounted",
-		wall_bottom = {-1/8, -1/2, -1/8, 1/8, 2/16, 1/8},
+local torch_suffix = {[0] = "_ceiling", "", "_wall", "_wall", "_wall", "_wall"}
+function default.torch_on_place(itemstack, placer, pointed_thing)
+	local under = pointed_thing.under
+	local node = minetest.get_node(under)
+	local nodedef = minetest.registered_nodes[node.name]
+	if nodedef and nodedef.on_rightclick and
+		not (placer and placer:is_player() and
+		placer:get_player_control().sneak) then
+		return nodedef.on_rightclick(under, node, placer, itemstack,
+			pointed_thing) or itemstack
+	end
+
+	local above = pointed_thing.above
+	local wdir = minetest.dir_to_wallmounted(vector.subtract(under, above))
+	local name = itemstack:get_name()
+	itemstack:set_name(name .. torch_suffix[wdir])
+	itemstack = minetest.item_place(itemstack, placer, pointed_thing, wdir)
+	itemstack:set_name(name)
+	return itemstack
+end
+
+function default.register_torch(name, defs)
+	local def = defs.floor
+	def.drop = def.drop or name
+	def.on_place = def.on_place or default.torch_on_place
+	minetest.register_node(":" .. name, def)
+	local def_ceiling = table.copy(def)
+	for key, value in pairs(defs.ceiling) do
+		def_ceiling[key] = value
+	end
+	def_ceiling.groups.not_in_creative_inventory = 1
+	minetest.register_node(":" .. name .. "_ceiling", def_ceiling)
+	local def_wall = table.copy(def)
+	for key, value in pairs(defs.wall) do
+		def_wall[key] = value
+	end
+	def_wall.groups.not_in_creative_inventory = 1
+	minetest.register_node(":" .. name .. "_wall", def_wall)
+end
+
+default.torch = {
+	floor = {
+		description = "Torch",
+		drawtype = "mesh",
+		mesh = "torch_floor.obj",
+		inventory_image = "default_torch_on_floor.png",
+		wield_image = "default_torch_on_floor.png",
+		tiles = {{
+				name = "default_torch_on_floor_animated.png",
+				animation = {type = "vertical_frames", aspect_w = 16, aspect_h = 16, length = 3.3}
+		}},
+		paramtype = "light",
+		paramtype2 = "wallmounted",
+		sunlight_propagates = true,
+		walkable = false,
+		liquids_pointable = false,
+		light_source = 12,
+		groups = {choppy=2, dig_immediate=3, flammable=1, attached_node=1, torch=1},
+		selection_box = {
+			type = "wallmounted",
+			wall_bottom = {-1/8, -1/2, -1/8, 1/8, 2/16, 1/8},
+		},
+		sounds = default.node_sound_wood_defaults(),
+		floodable = true,
+		on_flood = on_flood,
 	},
-	sounds = default.node_sound_wood_defaults(),
-	on_place = function(itemstack, placer, pointed_thing)
-		local under = pointed_thing.under
-		local node = minetest.get_node(under)
-		local def = minetest.registered_nodes[node.name]
-		if def and def.on_rightclick and
-			not (placer and placer:is_player() and
-			placer:get_player_control().sneak) then
-			return def.on_rightclick(under, node, placer, itemstack,
-				pointed_thing) or itemstack
-		end
-
-		local above = pointed_thing.above
-		local wdir = minetest.dir_to_wallmounted(vector.subtract(under, above))
-		local fakestack = itemstack
-		if wdir == 0 then
-			fakestack:set_name("default:torch_ceiling")
-		elseif wdir == 1 then
-			fakestack:set_name("default:torch")
-		else
-			fakestack:set_name("default:torch_wall")
-		end
-
-		itemstack = minetest.item_place(fakestack, placer, pointed_thing, wdir)
-		itemstack:set_name("default:torch")
-
-		return itemstack
-	end,
-	floodable = true,
-	on_flood = on_flood,
-})
-
-minetest.register_node("default:torch_wall", {
-	drawtype = "mesh",
-	mesh = "torch_wall.obj",
-	tiles = {{
-		    name = "default_torch_on_floor_animated.png",
-		    animation = {type = "vertical_frames", aspect_w = 16, aspect_h = 16, length = 3.3}
-	}},
-	paramtype = "light",
-	paramtype2 = "wallmounted",
-	sunlight_propagates = true,
-	walkable = false,
-	light_source = 12,
-	groups = {choppy=2, dig_immediate=3, flammable=1, not_in_creative_inventory=1, attached_node=1, torch=1},
-	drop = "default:torch",
-	selection_box = {
-		type = "wallmounted",
-		wall_side = {-1/2, -1/2, -1/8, -1/8, 1/8, 1/8},
+	ceiling = {
+		mesh = "torch_ceiling.obj",
+		selection_box = {
+			type = "wallmounted",
+			wall_top = {-1/8, -1/16, -5/16, 1/8, 1/2, 1/8},
+		},
 	},
-	sounds = default.node_sound_wood_defaults(),
-	floodable = true,
-	on_flood = on_flood,
-})
-
-minetest.register_node("default:torch_ceiling", {
-	drawtype = "mesh",
-	mesh = "torch_ceiling.obj",
-	tiles = {{
-		    name = "default_torch_on_floor_animated.png",
-		    animation = {type = "vertical_frames", aspect_w = 16, aspect_h = 16, length = 3.3}
-	}},
-	paramtype = "light",
-	paramtype2 = "wallmounted",
-	sunlight_propagates = true,
-	walkable = false,
-	light_source = 12,
-	groups = {choppy=2, dig_immediate=3, flammable=1, not_in_creative_inventory=1, attached_node=1, torch=1},
-	drop = "default:torch",
-	selection_box = {
-		type = "wallmounted",
-		wall_top = {-1/8, -1/16, -5/16, 1/8, 1/2, 1/8},
+	wall = {
+		mesh = "torch_wall.obj",
+		selection_box = {
+			type = "wallmounted",
+			wall_side = {-1/2, -1/2, -1/8, -1/8, 1/8, 1/8},
+		},
 	},
-	sounds = default.node_sound_wood_defaults(),
-	floodable = true,
-	on_flood = on_flood,
-})
+}
+default.register_torch("default:torch", default.torch)
 
 minetest.register_lbm({
 	name = "default:3dtorch",