I attended a pretty good clinic at the NMRA National on cardstock modeling. That fellow recommended 115 pound cardstock, which you can get at Office Depot. A ream is around fifteen bucks if memory serves. His clinic on cardstock buildings was really good. Clever Models has a website that offers kits, or just basic textures like brick walls and so forth. Most printers will take the 115 pound stuff. By layering it you can get really neat effects on buildings. Looks like interesting stuff to work with. Take a building roof for example. He had one done with three layers, palnking, felt, and shingles, and his roof with missing shingles, torn felt, and exposed planking looked very good. I have a kit of a company house I'm going to try. Lots of #11 X-acto blades and ACC!!!