Merge remote-tracking branch 'upstream/master'

README.md

@@ -74,4 +74,7 @@ SOFTWARE.
  * `nether_rack`* (files starting with "nether_rack"): Zeg9
  * `nether_tool_`* (files starting with "nether_tool_"): color adjusted versions from "[default](https://github.com/minetest/minetest_game/tree/master/mods/default)" mod, originals by BlockMen
 
+### [Unlicensed but permission for inclusion by kovaszos_uborka](https://www.planetminecraft.com/member/kovaszos_uborka/)
+ * `nether_brick_deep.png` (edited by TenPlus1)
+
 All other media: Copyright © 2013 PilzAdam, licensed under CC BY-SA 3.0 by PilzAdam.

crafts.lua

@@ -44,6 +44,14 @@ minetest.register_craft({
 	}
 })
 
+minetest.register_craft({
+	output = "nether:brick_deep 4",
+	recipe = {
+		{"nether:rack_deep", "nether:rack_deep"},
+		{"nether:rack_deep", "nether:rack_deep"}
+	}
+})
+
 minetest.register_craft({
     output = "nether:basalt_hewn",
     type = "shapeless",

nodes.lua

@@ -161,6 +161,13 @@ minetest.register_node("nether:fence_nether_brick", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
+minetest.register_node("nether:brick_deep", {
+	description = S("Deep Nether Brick"),
+	tiles = {"nether_brick_deep.png"},
+	is_ground_content = false,
+	groups = {cracky = 2, level = 2},
+	sounds = default.node_sound_stone_defaults()
+})
 
 -- Register stair and slab
 

portal_api.lua

@@ -2216,7 +2216,7 @@ function nether.volume_is_natural_and_unprotected(minp, maxp, player_name)
 			if id ~= c_air and id ~= c_ignore and id ~= nil then -- checked for common natural or not emerged
 				local name = minetest.get_name_from_content_id(id)
 				local nodedef = minetest.registered_nodes[name]
-				if not nodedef.is_ground_content then
+				if nodedef and not nodedef.is_ground_content then
 					-- trees are natural but not "ground content"
 					local node_groups = nodedef.groups
 					if node_groups == nil or (node_groups.tree == nil and node_groups.leaves == nil and node_groups.leafdecay == nil) then