What's the best way to apply a material to an instanceable prim?

[BigRoyNL (Roy Nieterau)]

@magost

asmbs

@magost

cmpts

Could you explain these abbreviations? Is this assemblies and components?

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Aside of that your question sounds quite similar to this topic. Where an answer was:

@paoloemilioselva

in general yes, especially when using instanceable, edits should be performed as part of composition arcs, so creating a class with your edits and then inheriting that on the elements you want those edits to applied on, is the way to go.
Not just for Materials, though.

You can also check the implicit prototypes generated in the stage, based on all your edits.