2014-07-17 Early papers of SSAO AO 0. "Image Enhancement by Unsharp Masking the Depth Buffer" SIGGRAPH 2006 http://graphics.uni-konstanz.de/publikationen/2006/unsharp_masking/webseite/ 1. "Hardware Accelerated Ambient Occlusion Techniques on GPUs" I3D 2007 http://www.okanarikan.com/Papers/SSAO/paper.pdf 2. "Finding Next Gen – CryEngine 2" SIGGRAPH 2007 http://developer.amd.com/wordpress/media/2012/10/Chapter8-Mittring-Finding_NextGen_CryEngine2.pdf Reference http://www.iquilezles.org/www/articles/ao/ao.htm