Hi, first time on here! Hope someone can help me with a critical deadline. So I’m trying to 3D print a model wall for an architecture project, having originally modeled in Rhino. In Rhino it’s comprised of several closed polysurfaces (some of the parts were unable to be joined to the main wall) but the tech at our uni has confirmed it should be 3D printable. As I’m unable to attach Rhino files I’ve attached the export to AutoCAD Solids. Attached is also an image regarding what the wall looks like, and its scale (30 mm high).

The problem is that it simply exports into .stl as a squiggly mess, either flat or low res, when opened in Makerbot. If anyone’s able to take a look at this it would be absolutely wonderful. Thanks!
walls_troubleshoot_print.dwg (5.31 MB)