Phew! Finally finished this wall. I actually did most of the work earlier in the summer for a challenge on PV, but due to a tight schedule I ran out of time, and couldn't finish it until now. So, here it is!

Used this scan:


As you can see, I edited it a LOT. Added tons of layers to get that 'vectoring' feel to it, cleaned the scan, added gradients, then painted the skin portions and the background. It took a lot of patience and trial-and-error, but I think I got the hang of things in the end. :p