register some nodes to the letters mod

init.lua

@@ -36,6 +36,4 @@ dofile(MP.."/crafts.lua")
 if minetest.get_modpath("letters") then
 	-- register letter nodes
 	dofile(MP.."/letters.lua")
-end
-
-minetest.log("action", "[scifi_nodes] loaded.")
+end

letters.lua

@@ -1,11 +1,5 @@
-letters.register_letters("scifi_nodes", "white2", "scifi_nodes:white2", "Plastic", "scifi_nodes_white2.png", {
-    paramtype2 = "colorwallmounted",
-    palette = "unifieddyes_palette_colorwallmounted.png",
-    groups = {
-        ud_param2_colorable = 1,
-        not_in_creative_inventory = 1,
-        not_in_craft_guide = 1,
-        oddly_breakable_by_hand = 1,
-        attached_node = 1
-    }
-})
+letters.register_letters("scifi_nodes", "black", "scifi_nodes:black", "Black wall", "scifi_nodes_black.png")
+letters.register_letters("scifi_nodes", "white2", "scifi_nodes:white2", "Plastic", "scifi_nodes_white2.png")
+letters.register_letters("scifi_nodes", "purple", "scifi_nodes:purple", "Purple node", "scifi_nodes_purple.png")
+letters.register_letters("scifi_nodes", "bluemetal", "scifi_nodes:bluemetal", "Blue metal", "scifi_nodes_bluemetal.png")
+letters.register_letters("scifi_nodes", "greenmetal", "scifi_nodes:greenmetal", "Green metal", "scifi_nodes_greenmetal.png")

nodeboxes.lua

@@ -131,8 +131,8 @@ minetest.register_abm({
 	nodenames = {"scifi_nodes:egg"},
 	interval = 30, chance = 10,
 	action = function(pos, node, _, _)
-		minetest.add_entity(pos, "scifi_mobs:xenomorph")
-		minetest.remove_node(pos)
+		minetest.env:add_entity(pos, "scifi_mobs:xenomorph")
+		minetest.env:remove_node(pos)
 	end
 })
 end
@@ -189,12 +189,12 @@ minetest.register_node("scifi_nodes:pad", {
 		if minetest.get_node({x=ppos.x, y=ppos.y, z=ppos.z}).name == "scifi_nodes:pad" then
 			clicker:setpos(position2)
 		end
-		local objs = minetest.get_objects_inside_radius(pos, 3)
+		local objs = minetest.env:get_objects_inside_radius(pos, 3)
                 for _, obj in pairs(objs) do
 				if obj:get_luaentity() and not obj:is_player() then
 				if obj:get_luaentity().name == "__builtin:item" then
 				local item1 = obj:get_luaentity().itemstring
-				local obj2 = minetest.add_entity(position2, "__builtin:item")
+				local obj2 = minetest.env:add_entity(position2, "__builtin:item")
 				obj2:get_luaentity():set_item(item1)
 				obj:remove()
 				end
@@ -223,12 +223,12 @@ minetest.register_node("scifi_nodes:pad", {
 		if minetest.get_node({x=ppos.x, y=ppos.y, z=ppos.z}).name == "scifi_nodes:pad" then
 			clicker:setpos(position1)
 		end
-		local objs = minetest.get_objects_inside_radius(pos, 3)
+		local objs = minetest.env:get_objects_inside_radius(pos, 3)
                 for _, obj in pairs(objs) do
 				if obj:get_luaentity() and not obj:is_player() then
 				if obj:get_luaentity().name == "__builtin:item" then
 				local item1 = obj:get_luaentity().itemstring
-				local obj2 = minetest.add_entity(position1, "__builtin:item")
+				local obj2 = minetest.env:add_entity(position1, "__builtin:item")
 				obj2:get_luaentity():set_item(item1)
 				obj:remove()
 				end
@@ -543,7 +543,6 @@ minetest.register_node("scifi_nodes:lightbars", {
 	},
 	drawtype = "nodebox",
 	paramtype = "light",
-	paramtype2 = "facedir",
 	use_texture_alpha = "blend",
 	light_source = minetest.LIGHT_MAX,
 	node_box = {
@@ -570,7 +569,6 @@ tiles = {{
 	drawtype = "nodebox",
 	sunlight_propagates = true,
 	paramtype = "light",
-	paramtype2 = "facedir",
 	node_box = {
 		type = "fixed",
 		fixed = {
@@ -591,7 +589,6 @@ tiles = {
 	drawtype = "nodebox",
 	sunlight_propagates = true,
 	paramtype = "light",
-	paramtype2 = "facedir",
 	node_box = {
 		type = "fixed",
 		fixed = {