Hello! I have some Civil3D files that contain 2D and 3D points/lines/polygons, as well as surfaces. These files need to be converted into a format that can be opened in Rhino for a client. I am having a challenging time successfully extracting all of the different types of data, and it's probably because I'm not as familiar with these data formats. Does anyone have any suggestions on how to do so?

A direct Civil 3D --> FBX results in a drop of 3D line/polygon data, but I'm sure there's something that can be done with something like a SurfaceModeller. Although, it's taking hours to process a relatively small file so I'm sure I have an incorrect setting somewhere.

Any help is appreciated!