To split a NURBS surface with a projection:
1. In the desired view, draw a 2D object or NURBS curve on top of a NURBS surface.
If the object to be projected is an open NURBS curve or open 2D object, both end points must be outside the NURBS surface.
2. Click the Project tool from the 3D Modeling tool set, and then select Split from the Tool bar.
3. Click on the splitting object, and then click on the NURBS surface.
The splitting object is projected onto the NURBS surface, resulting in a group of NURBS surfaces.
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