http://www.gameartisans.org/forums/showthread.php?t=2435&page=5
http://www.gameartisans.org/forums/showthread.php?t=2665&page=3
http://www.gameartisans.org/forums/showthread.php?t=2677&page=3
http://forums.cgsociety.org/showthread.php?f=234&t=601739&page=13&pp=15
http://www.cgtalk.ru/forum/showthread.php?t=19420&page=2
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