http://diaryofagraphicsprogrammer.blogspot.com/2008/03/light-pre-pass-renderer.html
http://www.ogre3d.org/forums/viewtopic.php?f=13&t=63763
http://bps10.idav.ucdavis.edu/talks/12-lauritzen_DeferredShading_BPS_SIGGRAPH2010.pdf
http://en.wikipedia.org/wiki/Deferred_shading
http://www.altdevblogaday.com/2012/03/01/light-pre-pass-renderer-on-iphone/
http://gamedevcoder.wordpress.com/2011/04/11/light-pre-pass-vs-deferred-renderer-part-1/
http://www.insomniacgames.com/tech/articles/0409/files/GDC09_Lee_Prelighting.pdf