To import NURB surfaces into Maxsurf, you can use the Import | Rhino .3dm file command from the File menu.  If you are starting a new design by importing a Rhino file, make sure you create a new design first from File | New. When importing a Rhino file which has trimmed surfaces a dialog box will appear asking you whether you wish to try and replicate the trimming.

Each NURB surface found in the file will become a surface in Maxsurf.

The orientation and dimensions of the imported model into the Maxsurf coordinate system depends on the orientation of the axis and units set in the 3dm file where the model originates from.

 View a video that shows the seamless data exchange from Maxsurf to Rhino and back.

Note: Importing trimming surfaces

On importation of a trimmed model from Rhino, trimming curves that do not necessarily lie on a surface/surface intersection may be present.  These contours can be used to trim the surfaces as any normal intersection line.  Visibility of these Rhino trimming contours may be turned on and off via the Display | Contours dialog.