Maybe not finishedd by far this is looking promising. It's always maddening when you start a city and come to the point of ... buildings. There just doesn't seem to be a quick way to get good results (at least I don't know of any as of yet). I once created a square brush in PS that aligns with drawing direction (so buildings can be aligned with streets) and varies in shape and color. No spectacular result but pretty fast, dont know if this can be done in Gimp though. As for the roads I think they could be a bit more straight (they're kinda wiggly now, but that's just me) ... anyway, interesting to see this progress. cheers and good luck with the buildings