Thats a kinda outdated tutorial, but it does work out fairly nicely for how simple a technique it is. You might wanna try following through my triangle terrain series if you want to get a bit more in depth with your rockwork...
http://www.snarkpit.net/editing.php?pag ... e=HL&id=16
http://www.snarkpit.net/editing.php?pag ... e=HL&id=18
http://www.snarkpit.net/editing.php?pag ... e=HL&id=17
Or this tutorial written by Agent, that is sort of a continuation of the one you followed...
http://www.snarkpit.net/editing.php?pag ... me=HL&id=8
That lava is begging to be scaled up by the way, it tiles really obviously ![]()