Converting Nurbs to Sub-D

Is it possible to import a multi patch trimmed nurb surface model and convert it to a usable Sub-D model in Rhino?

Hello - you’d have to go through the Mesh stage. For untrimmed surfaces, ExtractControlPolygon then SubDFromMesh (a test command, not finished) may be the thing. For trimmed faces, I think the only way is to Mesh the object and SubDFromMesh I’d say, depending on what you have, that this is unlikely to be what you’re after though.
SomeSubDs.3dm (246.0 KB)