Fixed the z-ordering issues thanks to an article by Iñigo Quilez (that guy's a genius), optimized the octree traversal algorithm and added a precalculated AO factor to spice it up a bit more ;)

By the way, each tile in the image is calculated in parallel. In this video there are 4 rendering threads and the main thread.

Oh, and there's no hardware acceleration of any kind :)

Camera model is still completely wrong, but it looks kinda alright :P