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

1. Choose Curve Edit > Rebuild Curve ❒.
2. In the Rebuild Type pop-up menu, choose Non-rational.
3. Click the rational curves or surfaces.
4. Click Go.
5. Use the Tolerance and Continuity Angle controls to adjust how close the new object 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.