Question Weird bug of SRP Batcher

Hello,

I've spent a week on a weird bug. When I turn on srp batcher, the _BaseColor.xyz of my shader has been changed from (1, 1, 1) to (0, 1, 0), which gives my object a green layer. The test scene is just a empty scene with a single gameObject. I guess the bug is from my shader, but now I have no idea how to trace it. The bug disappear if I turn off srp batcher. Also, I don't see this bug on windows editor<opengles3.2>. I am using 2019.4.17 and I tested it on an Android phone.

The test scene on editor:


The test scene on Android Phone:


Everything seems correct in FrameDebugger, the _BaseColor is white:


In RenderDoc, I edit the shader to output the _BaseColor. It shows the _BaseColor is green:

 

have you solved this issue yet?

 

I've solved it. The CBuffer(UnityPerMaterial) should be layouted same as shader properties for each shader. I rewrited my CBuffer(UnityPerMaterial) declaration to solve this issue.

The point is that, if you don't use SRP Batcher, you may construct your shader like:

A.shader
B.shader
C.shader
...
ShaderPropertyDeclaration.hlsl

You write all properties' declaration in a single ShaderPropertyDeclaration.hlsl. Then let all shaders include ShaderPropertyDeclaration.hlsl. Then in some day you want to enable SRP Batcher. You may just put all declaration in a CBuffer(UnityPerMaterial). However, this is wrong! The shader properties of shaders are different from each other!

Rewriting all shaders are really painful. In my project ShaderPropertyDeclaration.hlsl includes other files and these files use variables in ShaderPropertyDeclaration.hlsl. I have to rewrite them all.