There are a few building software programs out there. In the "good ole days", cardstock buildings were very common and can be made to look like a "real" kit by adding doors, windows, and 3-D details. I've seen some very fine cardstock buildings in contests I've helped judge. Some have won 1st place. For background flats, you sure can't beat the cost. Using a 'puter printer saves lots of time and effort too, and many look very good. Depending on you, is mostly how good they'll look. Not a bad thing for modeling.
