I'm trying to use "layer" to select what part of my scene is affected my a directional light. Problem is, even with Pro Builder installed in Unity, if I set a particular peice of a mesh to a certain layer name, it sets the whole mesh to be on that layer. So the directional light hits the whole mesh. I want the light to only hit specific polygons on the mesh, not the whole mesh. Is there a way to set the layer of specific polygons? How about setting the layer name of a specific material, and then putting that material on only those polygons? I can't find any option to set the layer name for a material either. Seems like layers only apply to meshes, and only to the whole mesh. Any ideas?
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