How to convert 3DM to IGS
- Add your .3DM file - drop it in the box above or click to browse.
- Convert it to .IGS in a few seconds.
- Download your new .IGS file.
What to expect
- IGES carries NURBS surfaces and wireframe, so geometry stays precise rather than becoming a mesh.
- Solids may be represented as surface sets rather than watertight bodies, which can leave gaps to repair.
- For 3D printing, an IGS still needs converting to a mesh format such as STL first.
Frequently asked questions
Is the geometry preserved when converting 3DM to IGS?
Largely, yes. IGES supports NURBS surfaces and wireframe, the same kind of geometry a 3DM stores, so the precise surfaces can transfer without being reduced to a triangle mesh.
Why convert 3DM to IGS?
IGES is a vendor-neutral CAD exchange standard, so it moves Rhino part geometry into other CAD programs that do not read 3DM but do accept IGES surfaces.
Where can I open the IGS file?
FreeCAD and Open Cascade CAD Assistant open IGES for free, and Autodesk Viewer can display it in a browser. It is a widely accepted CAD interchange format.
What might change in the conversion?
Closed solids may come across as a collection of surfaces rather than a watertight body, and some models need checking for gaps before downstream use such as machining.
Programs that convert 3DM: 3D Object Converter · CrossManager · TurboCAD · Autoconverter · PolyTrans|CAD+DCC · Vector CAD · EasySTONE · TurboCAD for Mac
