I had been wanting some desert-themed scatter terrain pieces, Bryce Canyon sort of stuff, but I couldn't figure out how to model it well. So, I built some pieces using PVC foam, cork board, drywall spackle, and some grit, following Terrain Tutor and similar approaches.
Then I scanned the pieces with 123D Catch and cleaned them up in Blender.
They print great. Enjoy and please post successful prints!
Update: 10/15/2016: Added two more pieces. That'll be it for this set, I think.