I do not use a lot of terrain in my games. We usually play without miniatures or I use my trusty old Battlemat. However, when I have used terrain it’s been from Fat Dragon. These people use the full potential of .PDF files for papercrafting.
The artwork is great, the designs are excellent, the instructions are clear, and they use layers to let you increase the visual variety. I’ve built a few of their sets and when I wanted to create a city for my Car Wars game, picking Fat Dragon’s products was a no-brainer.
Until March 1st their entire catalog is 50% off, so if you’re looking to get some quality papercraft terrain for your games, this is a good time to make the jump and give Fat Dragon a try.