OK there are N=10^6 triangles and that shows the raw GPU power. True indirect lighting would be N^2: this is both impossible and not worth the cost in terms of

OK there are N=10^6 triangles and that shows the raw GPU power. True indirect lighting would be N^2: this is both impossible and not worth the cost in terms of realism. So maybe they do it on a low LOD geometry or even a dirtier trick. A low LOD is probably also used for collision detection. Keep in mind that these people's job is to trick you, to the letter. Maybe there is not much more than a larger GPU and an simplified creation process in this demo.