Question SBP don't strip shader variants?

I'm upgrading asset bundle build method to scriptable build pipeline, but the result shows shader bundle size grown from 5MB to 22MB, and deep inside the bundle file I found there are more keywords in SBP
bundle.

1. I just use the CompatibilityBuildPipeline API to build bundles, and no other build task added.
2. I have tried disable fog and lightmap in Graphics settings, but the shader bundle result the same.

Seems the automatic shader variant strip process is failed in SBP.
Any idea? Thanks.

 

Hi, I encountered this issue before.

I solved it by using IPreprocessShaders: Firstly, I logged all shader variants to see whether there are redundant variants.
And I found some keywords are not stripped, so I strip them manually.

 

Thanks, I did a lot research, and finally did the nearly same process as yours.