I am currently mapping out a massive trade center city for my world and I have just finished getting the walls, streets, and house areas in place. The problem is that the city has a population of about 115,000 people so there are thousands of buildings. I was wondering if anyone had figured out a way to create a random scattering of various houses. I know there's a tutorial for doing this in gimp via mosaic but I am stuck with photoshop (and photoshop's mosaic filter is nothing like gimps). So any ideas as to how one might pull this off?