Convert rational to non-rational geometry

Convert rational surfaces to non-rational surfaces. Rational geometry can be more accurate but is harder to work with and is unusable by many other software packages.

1. Choose Surface Edit > Rebuild Surface .
2. In the Rebuild Type pop-up menu, choose Non-rational.
3. Click the rational surfaces.
4. Click Go.
5. Use the Tolerance and Continuity Angle controls to adjust how close the new surface must come to the shape of the original.

   A low value creates a more exact copy but with more complex geometry. A high value is less exact but creates simpler geometry.