How to read diffuse info from a pc.Material object?

I created a Material object and generate an image as gl_FragColor by shader, I want to set this image to another standardMaterial object as normalmap, is there a way to do this?

Hi guys
I want to learn how to use material.chunks, anyone share me some resource to learn it? thanks.

Here is a tutorial on how to use the shader chunks system:

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Thanks a lot for your reply.