Dirt occlusion from lighting?

Development Rendering
1

Hi all,

I am trying to make a material that is mostly glossy, but I want there to be patches of dirt on it, so that when I see the sun hit that area, the dirt doesn’t shine or reflect. I’ve seen roughly how to do this but nothing that speaks directly about what I want to do. What sort of set up would I need for this? What nodes etc would I need to use in material editor?

Simple question but one I’m sure one of you fine people will know the answer to.

Thanks in Advance!

2

All you need to do is have a higher roughness value where the dirt is. The documentation should be very helpful: 1.4 - Roughness | Unreal Engine Documentation

3

Ah, lovely, thanks! Shall have to give it a go. Seems simple enough!