[Bf-cycles] BVH paper

[Matthew Heimlich]

Came across this paper on BVH improvements for animation. It's
partially authored by Thiago Ize, the wizard behind the impossibly
fast BVH implementation in Arnold. I didn't see it on the Cycle wiki
'Papers' page so I thought I'd toss it up on the mailing list to see
if anyone could do anything with it.

Paper:
http://www.cs.utah.edu/~thiago/papers/rotations.pdf

Source Code:
http://mantawiki.sci.utah.edu/manta/index.php/Main_Page