If memory/disk consumption of this object is still 8% of it's polygonal counterpart I'm impressed.
I'm pretty sure that he also said their engine didn't have LoD.
No LoD on geometry or surface color/normal information is a sure way to get aliasing hell.
We prefilter our textures for a reason and would prefilter geometry if it would allow it. (like voxels do..)
Edited by Pottuvoi, 09 May 2012 - 11:44 AM.