What is Material ID pass ?

[JuhaW]

Render Channels > Color Channel > Material ID. It renders always black, no matter if materials have Material ID 0 or 1 or something else.

[bdancer]

It shows "Material Id Color" (at the bottom of the node).

[JuhaW]

Thank you, finally I found it All the time looking for N-panel node settings. So is this the best way to create material pass, to change every nodes Material Id Color to random ?

[bdancer]

Yes. You could also use Material ID number and use "MultiMatte" pass with "Use Mtl Id".

[JuhaW]

Yes, Multimatte works also. Is it possible for quicker material pass use, add material option for Render ID pass, so materials are also random colors ? Or similar way without need to change any material settings, just like Render ID pass currently do for objects.

[bdancer]

JuhaW, I've added a button that'll generate you random color for "Material ID" on "Standard Material" node.

[JuhaW]

Very well done, thank you, simplify material pass a lot.