Microtactix was on the leading edge of creating terrain for wargames and RPGs that you could download immediately and print on cardstock. The company has been quiet for some time (viz. the moribund Microtactix website), but a plethora of products remain for sale at RPGNow.

The early buildings, such as Vulture Gulch, are primitive by today’s standards — they’re just line-drawn and you have to color them in yourself(!) Yet, they’re not correspondingly inexpensive…

“Newer” sets such as Twilight Street (added 10 years ago) are fully colored and useful. I have many, many of these sets and retain a fondness for carefully assembling cardstock buildings.