I am working on a nature scene where there is a car due to nature it gets rusted and rather by time it gets old. I want to add grunge and rust texture. I had bought materials plugin a while ago, so used the already made plugins from there. The problem is I have no clue where to apply the roughness texture since I am not that experienced.
Firstly, the grunge and rust textures are from megascan ( not sure if this helps).
Where do I apply the image texture of grunges which I got fro megascans to , where do I plug it to be exactly?
I also have another metal material which has scratches over it, and it is premade, I would like to add some rust texture as well from megascans.
I can probably post the whole node, but I don't have 10 rep.