How to convert 3DM to OBJ
- Add your .3DM file - drop it in the box above or click to browse.
- Convert it to .OBJ in a few seconds.
- Download your new .OBJ file.
What to expect
- NURBS surfaces become polygon meshes on export - this is irreversible; the mathematical precision of the
.3dmis lost, so keep the original for any further CAD work. - Mesh density chosen at export time controls quality: too coarse and curved surfaces look faceted, too fine and the
.objbecomes very large - test with defaults first. - Standalone curves and Rhino layer structure are not preserved in
.obj; a.mtlmaterial file is written alongside but only basic diffuse colors transfer, not procedural materials.
Frequently asked questions
Can I convert 3DM to OBJ without Rhinoceros?
Yes - Blender's built-in Rhino 3DM importer is free and handles many models; Autodesk Fusion 360 also supports the format and is free for personal use.
Why does my OBJ look faceted after conversion?
The mesh density was set too low during export; re-export from Rhino with a finer mesh setting to better approximate curved surfaces.
Does the OBJ keep Rhino layers?
No - OBJ has no layer concept; Rhino can write each layer as an OBJ object group, but the layer hierarchy itself is not preserved.
Is OBJ the best format for taking a Rhino model into Blender?
OBJ is the simplest and most universally supported option for static geometry; if you also need materials or animations, FBX may be a better choice.
Programs that convert 3DM: 3D Object Converter · PolyTrans|CAD+DCC · Autoconverter · Autodesk Fusion 360 · Online CAD converter · Babel3D · AccuTrans 3D
