.3DM

A .3DM file is a native file format for 3D models in Rhinoceros CAD application software. It contains surface, point and curve information.

.3DM files can be exported in both NURBS (non-uniform rational B-spline) and polygon mesh representations, making it possible for other CAD / CAM / CAE / graphic design software to edit those models.

In addition to Rhino CAD software, .3DM files can be opened with Autodesk Fusion 360.