ID map node in Shader editor?

[melvi]

Does anyone know how to setup a IDmap nodegroup that you can plug a id map to and use to create a mask and can work with a lot of colors?

[josephhansen (BA Crew)]

Object Info node > Random Output

[melvi]

Thanks for the reply. No worries. Found this:

Color ID selector/mask node for cycles materials [SOLVED]

Ok, I found the solution. So obvious I feel dumb. It’s just a difference node. Difference mode compares areas and if the difference between colors is 0, it displays black. Then I just need to isolate black from the rest with “less than” (or color ramp, if you need more fluid threshold) and kaboom, ID mask. [47%20PM]

Should have searched the forums properly. I am curious why we don’t have a dedicated id mask node though. The compositor has one.