Quote - Alternatively, you can take just about any clothes textures and "dirty them up" in a paint program, possibly by using dirt brushes, or by making your own smudges and stains in the paint program.

Photoshop: Make a layer, render clouds with a nasty brown colour, set it to multiply or overlay mode, apply a watercolour filter to it.

I'm the asshole. You wanna be a shit? You gotta go through ME.