The Convert to NURBS command converts planar objects and 3D polygons into NURBS curves, and converts the faces of solids to NURBS surfaces. This is a quick way of creating NURBS curves from circles and arcs, or NURBS surfaces from an extrusion, sweep, or other solids.
To convert to NURBS curves or surfaces:
1. Select the object or solid to convert to NURBS surfaces.
2. Select Modify > Convert > Convert to NURBS.
The selection is converted to NURBS surface(s) or a NURBS curve, as reflected in the Object Info palette.
If the solid consisted of several faces, the conversion results in a group of NURBS surfaces. Select Modify > Ungroup to access the individual NURBS surfaces that make up the solid.
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