Hi, I'm looking for ways to export from AutoCAD 2015 for Mac to anything that keeps 2D and 3D as separate objects, preferably in the correct layers, to be used eventually by Unity 5. (For reference, it's a landscape reconstruction file including layers for different area states.)

As far as my search yielded results, both FBX and OBJ options are not available for export in AC for Mac'15, and neither can I use STL to export the 2D objects (only solids and watertight meshes would work). Are there any more options to try?

Thanks for any help.