I have a shader which is SRP batcher compatible and it batches fine in the Editor. After I built it to Android the frame debugger told the drawcall is not batched with an error **node is not compatible with SRP batcher**. What does the error mean?
The graphic API for Android is set to OpenGLES3.
Hi!
Which devices did you try?
I tried the Windows Editor and the Android device with OpenGLES 3. A few hours later I found the reason. I have some useless global float uniforms in my shader and after removing them the batcher on Android became fine. But no matter I remove them or not the batcher on Windows Editor always works.
Ah, this explains it 
SRP batcher requires everything to be in CBUFFERs. On DX11 all global variables end up in a global CBUFFER anyway, but that’s not the case with OpenGL or OpenGL ES.
Does that mean I need to explict put all my globals into another CBUFFER?
Only if you need to run on OpenGL ES.
Hello, do we need to explicit put all globals into a CBUFFER for batching on Vulkan (android) ?
And iOS/Metal ?
Vulkan and Metal should work the same as DX in this regard.
great, thanks!
Hey @aleksandrk - long time no see! Does this mean that even the builtin default shaders will not get SRP batched on OpenGL ES? I’ve tried adding a bunch of cubes with the URP lit material and running the scene on an Oculus Quest 2 and I get the same message - “SRP: Node is not compatible with SRP batcher”.
If this sounds like a bug, I could make a simple repro project.
If it’s intentional - what are the steps to get the builtin shaders to work with the SRP batcher on OpenGL ES?
Moreover, I want to write some shaders that are based on the builtin shaders and reuse as much of the unity HLSL code possible. It seems that if I include the core library, it defines the CBUFFER_START macros, but it also defines the global variables - so if I try and put them in a buffer inside my shader, I get an error that I’m redefining the existing variables.
Hopefully I’m just missing something here. I’m on Unity 2020.3.3f1, URP 10.4.0
Hi!
Builtin for the builtin pipeline?
There was a bug specifically on GL/GLES discussed here: https://discussions.unity.com/t/837563
Ah, yes - I updated the editor and URP versions and batching appears to be working now. Sweet, thank you!
Hey @aleksandrk , i’ve rendered several meshes with exact same shaders and preferences, but some of them on some reason not compatible with srp
The shader is either compatible or not.
I think it simply doesn’t ever report incompatibility for the first draw call in a batch.
