Acces to unity final pass shader (deferred)

Unity Engine
1

hi there,

does anybody know if we have access to the final pass shader (deferred lighting) which combines albedo, lighting and emission?
and if so, how?

thanks, lars

2

I thought that was all in Internal-PrePassLighting.shader ?

3

just like its name might indicate it only writes lighting and shadows but it does not combine albedo, lighting and emission.

4

The final pass is a classic per object pass you define in a shader. To get it, simply read the compiled shader and find a pass named… I think it was LightPass Final?

5

Yeah, Unity uses a lighting pre pass technique, which has everything rendered first into a G-buffer and then again reading from the L-buffer to determine final colour.

6

I find the shadow pipeline pretty confusing.
I try to sort it out with AutoLight.cginc

SHADOWS_NATIVE ???
SHADOWS_OFF No shadows
SHADOWS_SCREEN ???
SHADOWS_DEPTH ???
SHADOWS_CUBE Point light shadows
SHADOWS_SOFT Spot light shadows

Any ideas on what those ??? can be ?

7

hi dolkar,

thanks for the reply. i guess you are right. and it is called:
Name “PREPASS”
Tags { “LightMode” = “PrePassFinal” }
from what i can see.
well, i think i will have to get deeper into the actual rendering pipeline.

lars

8

Just want to share what I found. After looking at the compiled code, I found that

SHADOWS_NATIVE seems to use shadow2DEXT to sample the shadow map, in which the calculation whether the current z is in front of the shadow map is done in the hardware directly.

Meanwhile, SHADOWS_SCREEN seems to be the usual shadow map technique, using texture2DProj to sample the shadow map, and then compare the current z to the result in the code.

I am talking from OpenGL point of view, but I think it should be similar for DX as well