diff --git a/init.lua b/init.lua
index 68ff9a6..9d87fd4 100755
--- a/init.lua
+++ b/init.lua
@@ -1,6 +1,32 @@
 ts_doors = {}
 
+local function copytable(orig)
+	local orig_type = type(orig)
+	local copy
+	if orig_type == 'table' then
+		copy = {}
+		for orig_key, orig_value in next, orig, nil do
+			copy[copytable(orig_key)] = copytable(orig_value)
+		end
+		setmetatable(copy, copytable(getmetatable(orig)))
+	else
+		copy = orig
+	end
+	return copy
+end
+
+local function register_alias(name, convert_to)
+	minetest.register_alias(name        , convert_to        )
+	minetest.register_alias(name .. "_a", convert_to .. "_a")
+	minetest.register_alias(name .. "_b", convert_to .. "_b")
+end
+
 function ts_doors.register_door(recipe, description, texture)
+	register_alias("doors:ts_door_" .. recipe:gsub(":", "_"), "ts_doors:door_" .. recipe:gsub(":", "_"))
+	register_alias("doors:ts_door_full_" .. recipe:gsub(":", "_"), "ts_doors:door_full_" .. recipe:gsub(":", "_"))
+	register_alias("doors:ts_door_locked_" .. recipe:gsub(":", "_"), "ts_doors:door_locked_" .. recipe:gsub(":", "_"))
+	register_alias("doors:ts_door_full_locked_" .. recipe:gsub(":", "_"), "ts_doors:door_full_locked_" .. recipe:gsub(":", "_"))
+
 	local groups = minetest.registered_nodes[recipe].groups
 	local door_groups = {}
 	for k,v in pairs(groups) do
@@ -8,7 +34,10 @@ function ts_doors.register_door(recipe, description, texture)
 			door_groups[k] = v
 		end
 	end
-	doors.register("ts_door_" .. recipe:gsub(":", "_"), {
+
+	trapdoor_groups = copytable(door_groups)
+
+	doors.register("ts_doors:door_" .. recipe:gsub(":", "_"), {
 		tiles = {{ name = "[combine:32x38:0,0=" .. texture .. ":0,16=" .. texture .. ":0,32=" .. texture .. ":16,0=" .. texture .. ":16,16=" .. texture .. ":16,32=" .. texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base.png^[noalpha^[makealpha:0,255,0", backface_culling = true }},
 		description = description .. " Door",
 		inventory_image = "[combine:32x38:0,0=" .. texture .. ":0,16=" .. texture .. ":16,0=" .. texture .. ":16,16=" .. texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_inv.png^[noalpha^[makealpha:0,255,0",
@@ -20,22 +49,55 @@ function ts_doors.register_door(recipe, description, texture)
 		}
 	})
 
-	doors.register("ts_door_full_" .. recipe:gsub(":", "_"), {
+	doors.register("ts_doors:door_full_" .. recipe:gsub(":", "_"), {
 		tiles = {{ name = "[combine:32x38:0,0=" .. texture .. ":0,16=" .. texture .. ":0,32=" .. texture .. ":16,0=" .. texture .. ":16,16=" .. texture .. ":16,32=" .. texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_full.png^[noalpha", backface_culling = true }},
 		description = description .. " Door",
 		inventory_image = "[combine:32x38:0,0=" .. texture .. ":0,16=" .. texture .. ":16,0=" .. texture .. ":16,16=" .. texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_full_inv.png^[noalpha^[makealpha:0,255,0",
 		groups = door_groups,
 		recipe = {
 			{recipe},
-			{"doors:ts_door_" .. recipe:gsub(":", "_")},
+			{"ts_doors:door_" .. recipe:gsub(":", "_")},
 		}
 	})
 
+	doors.register_trapdoor("ts_doors:trapdoor_" .. recipe:gsub(":", "_"), {
+		description = description .. " Trapdoor",
+		inventory_image = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor.png^[noalpha^[makealpha:0,255,0",
+		wield_image = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor.png^[noalpha^[makealpha:0,255,0",
+		tile_front = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor.png^[noalpha^[makealpha:0,255,0",
+		tile_side = texture .. "^[colorize:#fff:30",
+		groups = trapdoor_groups,
+	})
 
+	doors.register_trapdoor("ts_doors:trapdoor_full_" .. recipe:gsub(":", "_"), {
+		description = description .. " Trapdoor",
+		inventory_image = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor_full.png^[noalpha",
+		wield_image = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor_full.png^[noalpha",
+		tile_front = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor_full.png^[noalpha",
+		tile_side = texture .. "^[colorize:#fff:30",
+		groups = trapdoor_groups,
+	})
+
+	minetest.register_craft({
+		output = "ts_doors:trapdoor_" .. recipe:gsub(":", "_"),
+		recipe = {
+			{recipe, recipe},
+			{recipe, recipe},
+		}
+	})
+
+	minetest.register_craft({
+		output = "ts_doors:trapdoor_full_" .. recipe:gsub(":", "_"),
+		recipe = {
+			{recipe},
+			{"ts_doors:trapdoor_" .. recipe:gsub(":", "_")},
+		}
+	})
 
 	door_groups.level = 2
+	trapdoor_groups.level = 2
 
-	doors.register("ts_door_locked_" .. recipe:gsub(":", "_"), {
+	doors.register("ts_doors:door_locked_" .. recipe:gsub(":", "_"), {
 		tiles = {{ name = "[combine:32x38:0,0=" .. texture .. ":0,16=" .. texture .. ":0,32=" .. texture .. ":16,0=" .. texture .. ":16,16=" .. texture .. ":16,32=" .. texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_locked.png^[noalpha^[makealpha:0,255,0", backface_culling = true }},
 		description = description .. " Locked Door",
 		inventory_image = "[combine:32x38:0,0=" .. texture .. ":0,16=" .. texture .. ":16,0=" .. texture .. ":16,16=" .. texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_locked_inv.png^[noalpha^[makealpha:0,255,0",
@@ -50,7 +112,7 @@ function ts_doors.register_door(recipe, description, texture)
 		}
 	})
 
-	doors.register("ts_door_full_locked_" .. recipe:gsub(":", "_"), {
+	doors.register("ts_doors:door_full_locked_" .. recipe:gsub(":", "_"), {
 		tiles = {{ name = "[combine:32x38:0,0=" .. texture .. ":0,16=" .. texture .. ":0,32=" .. texture .. ":16,0=" .. texture .. ":16,16=" .. texture .. ":16,32=" .. texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_full_locked.png^[noalpha", backface_culling = true }},
 		description = description .. " Locked Door",
 		inventory_image = "[combine:32x38:0,0=" .. texture .. ":0,16=" .. texture .. ":16,0=" .. texture .. ":16,16=" .. texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_full_locked_inv.png^[noalpha^[makealpha:0,255,0",
@@ -60,7 +122,49 @@ function ts_doors.register_door(recipe, description, texture)
 		sound_close = "doors_steel_door_close",
 		recipe = {
 			{recipe},
-			{"doors:ts_door_locked_" .. recipe:gsub(":", "_")},
+			{"ts_doors:door_locked_" .. recipe:gsub(":", "_")},
+		}
+	})
+
+	doors.register_trapdoor("ts_doors:trapdoor_locked_" .. recipe:gsub(":", "_"), {
+		description = description .. " Locked Trapdoor",
+		inventory_image = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor_locked.png^[noalpha^[makealpha:0,255,0",
+		wield_image = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor_locked.png^[noalpha^[makealpha:0,255,0",
+		tile_front = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor_locked.png^[noalpha^[makealpha:0,255,0",
+		tile_side = texture .. "^[colorize:#fff:30",
+		protected = true,
+		sounds = default.node_sound_stone_defaults(),
+		sound_open = "doors_steel_door_open",
+		sound_close = "doors_steel_door_close",
+		groups = trapdoor_groups
+	})
+
+	doors.register_trapdoor("ts_doors:trapdoor_full_locked_" .. recipe:gsub(":", "_"), {
+		description = description .. " Locked Trapdoor",
+		inventory_image = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor_full_locked.png^[noalpha",
+		wield_image = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor_full_locked.png^[noalpha",
+		tile_front = texture .. "^[transformR270^[colorize:#fff:30^ts_doors_base_trapdoor_full_locked.png^[noalpha",
+		tile_side = texture .. "^[colorize:#fff:30",
+		protected = true,
+		sounds = default.node_sound_stone_defaults(),
+		sound_open = "doors_steel_door_open",
+		sound_close = "doors_steel_door_close",
+		groups = trapdoor_groups
+	})
+
+	minetest.register_craft({
+		output = "ts_doors:trapdoor_locked_" .. recipe:gsub(":", "_"),
+		recipe = {
+			{"default:steel_ingot"},
+			{"ts_doors:trapdoor_" .. recipe:gsub(":", "_")},
+		}
+	})
+
+	minetest.register_craft({
+		output = "ts_doors:trapdoor_full_locked_" .. recipe:gsub(":", "_"),
+		recipe = {
+			{recipe},
+			{"ts_doors:trapdoor_locked_" .. recipe:gsub(":", "_")},
 		}
 	})
 end
diff --git a/textures/ts_doors_base_trapdoor.png b/textures/ts_doors_base_trapdoor.png
new file mode 100644
index 0000000..dcfe61d
Binary files /dev/null and b/textures/ts_doors_base_trapdoor.png differ
diff --git a/textures/ts_doors_base_trapdoor_full.png b/textures/ts_doors_base_trapdoor_full.png
new file mode 100644
index 0000000..84da220
Binary files /dev/null and b/textures/ts_doors_base_trapdoor_full.png differ
diff --git a/textures/ts_doors_base_trapdoor_full_locked.png b/textures/ts_doors_base_trapdoor_full_locked.png
new file mode 100644
index 0000000..68cd8f2
Binary files /dev/null and b/textures/ts_doors_base_trapdoor_full_locked.png differ
diff --git a/textures/ts_doors_base_trapdoor_locked.png b/textures/ts_doors_base_trapdoor_locked.png
new file mode 100644
index 0000000..109220e
Binary files /dev/null and b/textures/ts_doors_base_trapdoor_locked.png differ