Remove SRP Batcher compatibility from custom shader

Unity Engine
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Hi, does anyone have an idea of how to remove SRP Batcher compatibility from a shader?

I will be trying to implement GPU instancing for the same shader but need to get rid of SRP Batcher compatibility for it first. I know how to deactivate the feature globally in the Rendering Asset, but that’s not what I’m looking for.

Per “documentation”, I copy the ShaderGraph generated code into a new .shader file, add a new material property under “Properties”, NOT declaring it under “CBUFFER”, and that should do the trick… but instead, after recompiling, the shader is still marked as “SRP Batcher - compatible”.

I also tried utilising the newly generated property somewhere in the shader code, with no luck in breaking the SRP Batcher compatibility. Not being an expert (at all) in hlsl, I have no idea of what to try in order to actually break it.

So, am I missing something? Maybe it is really not compatible anymore but is still flagged as it is?

If someone could help, it would be awesome!

2

EDIT: I managed to make the shader incompatible with SRP Batcher, but in my own way:

  • Instead of declaring a property under “Properties” and not under “CBUFFER” as the documentation stated, I did the opposite: in my shader’s generated code, went straight to the “CBUFFER_START(UnityPerMaterial)” section, and added this line (any line of this sort would have been ok, actually) before “CBUFFER_END”: float SRPBreaker;

  • Saved the shader, and it compiled, but this time showing “not compatible” on the SRP Batcher section, with a message saying “UnityPerMaterial CBuffer inconsistent size inside etc etc…”

Hope this could help anyone having the same blocker that I had, at least in finding a different way to reach a solution!