Terrain bases

Almost all terrain pieces look better if you add a base to them. Sure, you can carve out a base from MDF (wear a mask) or cardboard (it will warp) or some kind of plastic (not easy to come by good materials, or expensive). Why not 3D print them?

This is a set of modular terrain bases. Piece together any base you can imagine. Glue it together on top of a thin paper. Then you can texture them, paint them and decorate the terrain much better.

In the photos I have used three other terrain pieces f