Fake BRDF

Came across this topic.

Explanation and a shader example -

https://alastaira.wordpress.com/2013/11/26/lighting-models-and-brdf-maps/

Youtube vid -

https://www.youtube.com/watch?v=_Y_0cgWu5bQ

Nice the same technique from Shadowgun.

Yes, I think it is.

ShadowGun: Optimizing for Mobile Sample Level

http://blogs.unity3d.com/2012/03/23/shadowgun-optimizing-for-mobile-sample-level/

I wonder if this technique is how darksouls renders phantoms