Painting layers of dirt and wear

One of the biggest things when you're making a texture especially for a place…that's been around a while and maybe worn down or dirty is to think of the dirt in layers.…At some point this gas station was probably clean and functional. Over the…years and weather, it's gotten weathered, dirty, decayed, splintered, mossy, and so forth.…So the important part is to start out as if it was clean and then start to…build up those layers.…We've got the occlusion to help with that and I've already shown some painting,…adding in tiling dirt across the top and bottom of these large panels.…

I can see a goof, I need to fix, where I just need more white and more dirt right up here.…That or I need to trim back when the occlusion pieces as it's masking over some of this tile.…The other thing I need to do is to well, paint in some of the dirt.…What I'll show is how to take the occlusion and flip it so instead of dark on…the windows, it actually goes light as if there was dust that it build up there overtime.…