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The Mix Weight of a Mix Shader seems to refer only on the principal UV set. I need to chose another one. Is it possible or I misunderstand something about MixShader?
Thank you!
The mix shader evaluates the shaders you plug into it. Those are the shaders where you can control the uv set. For example, if you plug an image node into the mix weight, the image node is where you can specify a UV set.