It is a simple (and slow) 4x8 depthmap sample comparision. It adds or sustracts from a starting 0.5 value without taking account of depth difference. Since the camera angle mantaines the polygon depth into a small range, it works good and looks plausible. I have to improve the algorithm in order to reduce the depthmap samples, something like the pixel coord based vector election of your SSAO shader

edited.
I move the samples center in sun light direction for each step too.

@txesmi
looks really nice!
How is the performance?

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After a lot of adjustments I finally finished colorgrading and softshadows:



(click to view in full size)

POTATO-MAN@ is that a spotlight? looks perfect, I wonder about the performance

Freaking cool shit
PotatoMan, txesmi and HeelX

@txesmi
I really like that look you created there.

Thanks
Great to hear that you like it, since it was a lot of work for me.

@3run
yes this is a spotlight.
performance is okay as long as you don't use too many lights (max number is 16 at the moment)

POTATO-MAN@ well, what if I'll have 4 spotlight at the same scene, will that drop performance critically?

4 should be okay, and there is still room for performance improvements (the code im currently using is unoptimized)

10 Were still okay for me but that also depends on the scene complexity (especially number of objects)

What kind of color grading do you use? 3D-LUTs?

pipeline ready for last settings

txesmi@ there are shadows only from the sun, right?