OTOY Forums

making a decal, or label, or any texture with an alpha, is pretty straightforward in C4D's renderer--just use the alpha channel, and copy the same png or whatever into the alpha slot, and you're done

octanes a bit different I'm finding and I can't figure out how it should work exactly.

any tips?

Yes because it's not a realtime renderer and also cpu renderer. Can easily evaluate some sub versions of material combinations at render time but it's not possible for octane atm. But don't worry i'm bringing a different approach after some hard works. Still with some limitations that's possible for next release.
See: download/file.php?id=52639&mode=view

interesting, okay, thanks

Actually another way is possible. Each Octane texture nodes can be connected a Octane transform/projection node. So you can give different mappings for every textures. Also it's possible to combine different textures/materials mix_texture to mix_material.

You can check this video manuals. Texturing or Shaders.
https://docs.otoy.com/#28Cinema4D%20Plugin%20Edition

anyone else interested on decals/alpha/etc, here are a couple more resources:

https://www.youtube.com/watch?v=eNSOyW9ho6I

https://www.youtube.com/watch?v=nIHCfhowZpk