http://www.gameartisans.org/forums/showthread.php?t=2243

http://www.gameartisans.org/forums/showthread.php?t=2273

http://www.gameartisans.org/forums/showthread.php?t=2277

http://forums.cgsociety.org/showthread.php?f=234&t=598278

http://forums.3dtotal.com/showthread.php?t=56637