Ah, I assure you it's a screenshot! I've still got the original around still. I did redo the wall texture, but that's just because I couldn't get it to look nice. It's from my Catstill map. I mean, maaaaaybe it could go in the art thread, but I would feel kind of bad putting screenshots in there. I dunno, is it out of place enough to warrant moving over there?
EDIT: Here's the orginal.