Uv texture creation

Hey, I’m looking to make a simple wrinkle uv texture for like, pants and a trenchcoat, nothing fancy, just a kind of cartoony clothing texture, but I have no idea how to go about creating it, should I just draw something up in gimp? or is there some other better way to go about this? in short, how would you go about creating uv texture, because I don’t want to use some half rate texture I find on google or something that doesn’t really go with what I’m working on.

I would just use blenders texture paint tools to paint a bump map. To texture paint in the 3D window, just select texture paint mode in the main header, and you will find your tools in the edit buttons.