Just had a quick question. In the image below, I am trying to get dust to show up at only the white parts of an image. I am trying to get a PBR dust effect where when you look at it, at an angle, you can see the dust film better. I know you do this with a fresnel node. The trouble that I am running into is that there is fresnel on the whole object and where white is on the object, that's where dust is supposed to be. I was able to access just the top parts of the model where dust should physically lie (second image below) but I can't figure out how to get the fresnel effect to work only on this top data.
What're your guys' thoughts?