Change hell.DEPTH to -19640 to keep the compat. with legacy code

init.lua

@@ -19,7 +19,7 @@ hell.path           = minetest.get_modpath(hell.modname)
 hell.get_translator = S
 
 -- Settings
-hell.DEPTH                      = -20000 -- The y location of the Hell
+hell.DEPTH                      = -19640 -- The y location of the Hell
 hell.FASTTRAVEL_FACTOR          =     10 -- 10 could be better value for Minetest, since there's no sprint, but ex-Minecraft players will be mathing for 8
 hell.HELL_REALM_ENABLED       =  true -- Setting to false disables the Hell and Hell portal
 

items.lua

@@ -37,6 +37,14 @@ local function add_more_nodes(name)
 	end
 end
 
+local function add_aliases(old, new)
+	minetest.register_alias("nether:"..old, "hell:"..new)
+	minetest.register_alias("nether:stair_"..old, "hell:stair_"..new)
+	minetest.register_alias("nether:slab_"..old, "hell:slab_"..new)
+	minetest.register_alias("stairs:stair_"..old, "hell:stair_"..new)
+	minetest.register_alias("stairs:slab_"..old, "hell:slab_"..new)
+end
+
 --[[
 local function add_fence(name)
 	local def = minetest.registered_nodes[name]
@@ -86,7 +94,7 @@ minetest.register_node("hell:hellrack", {
 	end,
 })
 add_more_nodes("hellrack")
-minetest.register_alias("nether:netherrack", "hell:hellrack")
+add_aliases("netherrack", "hellrack")
 
 minetest.register_node("hell:hellrack_tiled", {
 	description = "Tiled Hellrack",
@@ -98,7 +106,7 @@ minetest.register_node("hell:hellrack_tiled", {
 	end,
 })
 add_more_nodes("hellrack_tiled")
-minetest.register_alias("nether:netherrack_tiled", "hell:hellrack_tiled")
+add_aliases("netherrack_tiled", "hellrack_tiled")
 
 minetest.register_node("hell:hellrack_soil", {
 	description = "Dirty Hellrack",
@@ -109,7 +117,7 @@ minetest.register_node("hell:hellrack_soil", {
 		return digging_allowed(player, 2)
 	end,
 })
-minetest.register_alias("nether:netherrack_soil", "hell:hellrack_soil")
+add_aliases("netherrack_soil", "hellrack_soil")
 
 minetest.register_node("hell:hellrack_black", {
 	description = "Black Hellrack",
@@ -121,7 +129,7 @@ minetest.register_node("hell:hellrack_black", {
 	end,
 })
 add_more_nodes("hellrack_black")
-minetest.register_alias("nether:netherrack_black", "hell:hellrack_black")
+add_aliases("netherrack_black", "hellrack_black")
 
 minetest.register_node("hell:hellrack_blue", {
 	description = "Blue Hellrack",
@@ -133,7 +141,7 @@ minetest.register_node("hell:hellrack_blue", {
 	end,
 })
 add_more_nodes("hellrack_blue")
-minetest.register_alias("nether:netherrack_blue", "hell:hellrack_blue")
+add_aliases("netherrack_blue", "hellrack_blue")
 
 -- Hellbrick
 minetest.register_node("hell:hellrack_brick", {
@@ -146,7 +154,7 @@ minetest.register_node("hell:hellrack_brick", {
 	end,
 })
 add_more_nodes("hellrack_brick")
-minetest.register_alias("nether:netherrack_brick", "hell:hellrack_brick")
+add_aliases("netherrack_brick", "hellrack_brick")
 
 minetest.register_node("hell:hellrack_brick_blue", {
 	description = "Blue Hellrack Brick",
@@ -158,7 +166,7 @@ minetest.register_node("hell:hellrack_brick_blue", {
 	end,
 })
 add_more_nodes("hellrack_brick_blue")
-minetest.register_alias("nether:netherrack_brick_blue", "hell:hellrack_brick_blue")
+add_aliases("netherrack_brick_blue", "hellrack_brick_blue")
 
 minetest.register_node("hell:hellrack_brick_black", {
 	description = "Black Hellrack Brick",
@@ -170,7 +178,7 @@ minetest.register_node("hell:hellrack_brick_black", {
 	end,
 })
 add_more_nodes("hellrack_brick_black")
-minetest.register_alias("nether:netherrack_brick_black", "hell:hellrack_brick_black")
+add_aliases("netherrack_brick_black", "hellrack_brick_black")
 
 minetest.register_node("hell:white", {
 	description = "Siwtonic block",