http://www.oscalebuildings.com 12 O scale background model railroad buildings are now available to download. They are in A3 [tabloid] and A4 [letter] sizes for easy printing at home or at a local copy shop. These O scale buildings don’t need painting or weathering and you can make them super-duper strong by building with cheap to buy corflute sheeting. The detailing uses a special technique to prevent any loss of clarity in O scale.
They are also available for HO scale, and OO, and N scale.