Extract Texture From Shader After Pass

Hey folks,

I'm trying to extract a texture from a shader after the final pass of that shader, so I can get a texture with lighting applied to it.

Something like this:

Textured Object => Shader applies lighting => Shader outputs final texture with lighting

I've tried doing this in the Shader with

Code (csharp):

1. SetTexture[_OutputTex] { combine texture }

I've also tried { combine primary } and using GrabPass { } to get the last pass.

Then in a script attached to the object I have this, which waits until the rendering has finished before copying the pixel data over to a texture I make at runtime.

Code (csharp):

1. IEnumerator AfterRender ()
2.     {
3.         while (true)
4.         {
5.             yield return new WaitForEndOfFrame();
6.             Color32[] pixels = (rend.material.GetTexture("_OutputTex") as Texture2D).GetPixels32();
7.             outputTex.SetPixels32(pixels);
8.             outputTex.Apply();
9.         }
10.     }

The outputTex does not change though.

Ultimately I want to be able to take the texture of from a character with lighting applied to it, including any shadows being cast.

What is the best way to do this?

Thanks!!
~Jake

 

Hey Bob did you ever figure this out?

 

No go sir. I think it could be done with a custom rendering solution.

 

I believe what you're looking for is RenderTexture: https://docs.unity3d.com/ScriptReference/RenderTexture.html