Importing 3D Polyines into C3D without losing curve data?

[jdolbeyZREE6]

As the title implies, I am looking for a way to import 3D Polylines into C3D without losing the curve data. Anytime I import them they come in with tessellated curves. Is this possible? 

[TerryDotson · Accepted solution]

The 3dPolyline Object has never been improved since it was created and cannot display arcs nor linetypes.  You will need to use Civil3D FeatureLines if you want curves.