HyperShot

(via Wired) HyperShot is a unique application developed by computer graphics genius Henrik Wann Jensen + it uses a proprietary photon-mapping technique to simulate complex lighting situations ranging from reflected sunlight to spots beamed through colored gels to create ultrarealistic images, like the diamonds @ http://www.wired.com/software/coolapps/multimedia/2008/04/st_render?slide=2&slideView=2

Amazing!

Useful link:
http://graphics.ucsd.edu/~henrik