I don't do many walls. I've only done 1 GIMP wall and 2 photoshop walls but I had to scrap 1 b/c it was horrible.Photoshop:GIMP:
The Redd one is better, but they aren't all that good, but they aren't HORRIBLE. They are solid for a beginner. Stick with sigs for now, and do more like that Troy Brown sig. That one is GREAT.