Using vertex maps to create grunge?

[pileofpixels]

So ben watts has made a great tutorial for c4d were he uses the vertex weight map to basically paint on grunge. here is the link https://vimeo.com/93337566. Is this possible with octane in a similar way with the mix material. Trying to figure out how to define more where I want my grunge and not so random. Thanks for the help.

[Malaurny]

Hello,

I didnt' watch this tutorial yet, but as I understand it you should actually use a mix texture with:
-Mat A = principal texture
-Mat B = grunge texture
-As the amount "object" use a B&W image texture as a map for your grunge texture. So you can create this image with photoshop or else, and specify exactly where you want the grunge texture to appear.

Hope this is helpful. Once again as I didn't watch the tuto I'm not sure this answers your question.