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I have decals on my mesh in Cycles by way of placing it over my original material with a mix shader.

How can I render my decals alone on a 2nd render pass?

Thank you!

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    $\begingroup$ I think you'd need either a separate object, separate geometry, or at least a separate material, if I'm not mistaken $\endgroup$ – Duarte Farrajota Ramos Mar 22 '18 at 19:54
  • $\begingroup$ Can I have 2 materials applied to the same vertices/faces? $\endgroup$ – jfarn Mar 22 '18 at 22:08
  • $\begingroup$ No and no. You can't apply materials to vertex, nor can you have more than one material assigned to a face. How would you render that? $\endgroup$ – Duarte Farrajota Ramos Mar 22 '18 at 22:22
  • $\begingroup$ I tried making a duplicate mesh that is transparent except for the decal, but then when I rotate the object, the decal always shows, even when it isn't facing the camera. Could you think of potential workaround? $\endgroup$ – jfarn Mar 22 '18 at 22:25

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