For Krait in the shoot em up competition I made a DB Classic building generator. DB makes the skyscrapers from random windows, random walls, random number of floors, random width, random height. It also positions tables, and chairs, filing cabinets, doors, and paints the inside random colours. Then I just press print screen to make it 2D. And paste it in an art package. Each building was made from hundreds of components, even down to the girders inside the building. And Van B made a random rubble generator for the rubble on the ground.