The Rhinoceros Import/Export Add-ons are parts of the Rhino – Grasshopper – ARCHICAD Toolset.
Exchange models in Rhinoceros native file format
Designers may choose to work with a "reference model workflow" by exporting and importing models between ARCHICAD and Rhinoceros using the native Rhinoceros (.3dm) file format.
Rhino Export enables users to pass on the geometry — using various representation methods — of a model produced in ARCHICAD to Rhino.
Rhino Import enables users to pass on a model created in Rhino to ARCHICAD. The imported model will appear as a GDL object maintaining the logical buildup of the original Rhino model.