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I have two objects, A and B, with the same mesh data. I am assigning material M to some faces of A. What I want is to independently be able to assign different material to different set of faces in object B.

All my objects' materials are linked to "Object". What I observe, independence is only available when using single material per entire object and not when assigning materials to faces. When I do the latter, each object sharing the same mesh data (A and B in my example) shares face selection for each material so there is a link between objects I do not want to have.

Simple example:

Objects: A, B (each has mesh data D)
D mesh data is consisted of faces: F1 F2 F3 F4
Objectives:


    

  • Object A has material M1 assigned to F1 and F2
    • 

  • Object B has material M2 assigned to F2 and F3
    • 

  • No other faces have material assigned
    •

PS: I do not want to duplicate mesh data of A and B (of course for project's sanity reasons).

Blender 2.91.0

Jared
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  • Hello :). Well, material slots are a part of mesh data. To assign materials to different faces, you need to use some other way than material slots (vertex groups/UV maps,...) – jachym michal Jan 18 '21 at 11:58
  • Thanks @JachymMichal, do you mean vertex groups+UV maps? Because vertex groups alone let me to only select faces that I can traditionally assign material to them, what is the original challenge I am describing. – Jared Jan 19 '21 at 12:17
  • Hey :). I just realized this isn't as easy as I thought - but these answers could help: Weight paint in cycles nodes? – jachym michal Jan 19 '21 at 14:21

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