SSAO

可参照gamedev上的这篇文章:
http://www.gamedev.net/page/resources/_/technical/graphics-programming-and-theory/a-simple-and-practical-approach-to-ssao-r2753
 

这篇是中文翻译:

http://blog.csdn.net/xoyojank/article/details/5734537
 

百度百科对AO和SSAO的介绍也不错:

http://baike.baidu.com/view/3889497.htm 

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