NURBS surfaces are based on splines and are mainly used for free-form surfaces such as those used in the automotive industry. There are two processes for creating NURBS surfaces and several commands to edit them, which are presented next.
We can create NURBS surfaces by previously specifying a value
1 for the
SURFACEMODELINGMODE system variable and applying surface creation commands, or by converting existing objects with the
This variable is not saved and by default is set to