Why it is called "screen space"

Screen Space Ambient Occlusion (SSAO)

Note:

Why AO?

Blinn-Phong Reflection Model (Ambient Light)

Blinn-Phong Reflection Model (Ambient Light)

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/e0816093-f92f-4dd7-a361-4b05f7481093/Untitled.png

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/024f4aab-7b0c-47fc-9d5b-372d4cfc5987/Untitled.png

Dive Deep 深入理解

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/7c5a7df9-667f-45ef-b3d6-c8a4fbdcfbea/Untitled.png

把 Visibility 拆出去

https://s3-us-west-2.amazonaws.com/secure.notion-static.com/e7d3a38b-2228-4309-803b-bc14a1492f1d/Untitled.png

还可以看成是 the average f(x) in the support of g(x)

这种拿出来的近似 split sum 什么时候准确呢?Accuracy