Fragments within site context - 3D printed model

Here is my first 3D printed model where I experimented with the fragments within the site context. 

To produce this model I had to produce the 3D model using Rhino then import it as a STL file into a software called Zprint which detects all the bad surfaces in the 3D model before sending it to the 3D printing machine. There you can fix those surfaces and save the file as necessary before proceeding.