3D Alien Worlds has a wide range of 3D Printable terrain. From the Samurai / Japanese themed buildings and terrain to Necron, to High Elves and soon to be some vehicles. He pretty much covers it all.

From his Kickstarter: Since 1998 I am in business making terrain for gamers and modellers.
Former in classic production of resin models, I started to create buildings as 3D models.

Player and designer of printable decorations for games table, wargames and model making.

3DHexes is best known for their line of “Tangled Realm” scatter terrain. It is a kind of universal terrain that could be used in most settings. He’s also got a line of texture rollers for building scenery.

We are partners with a passion for 3D design and printing. We have been in the 3D printing and modeling business for over 7 combined years. As our own customers, we make models that we would want to use. You will always get good quality models from us, because we make them for us!

Aether Studios has a very large catalog of 3D printable terrain available from Drivethru RPG.

I am a 3d designer and have over 20 years of experience in the field of 3D graphics; i know very well lowpoly modeling, procedural modeling, sculpting and development of interactive projects through Unreal engine and i love role-playing and board games!!!