Deferred Shading
http://www.ogre3d.org/tikiwiki/tiki-index.php?page=Deferred+Shading
http://www.ogre3d.org/forums/viewtopic.php?f=4&t=71392
http://www.ogre3d.org/forums/viewtopic.php?f=1&t=67341
Modern Illumination GSOC thread
http://www.ogre3d.org/forums/viewtopic.php?f=13&t=63763