This is a modified version of lkjoel's nether mod. Look here if you want to see the differences: https://github.com/HybridDog/minetest-nether/compare/lkjoel:master...master this happens really selden to me http://i.imgur.com/pMZYqt9.png TODO: — care about nether torches — find a way to get the perlin noise inside [-1; 1] or use another noise