Commands
MakeSubDFriendly
MakeSubDFriendly
The MakeSubDFriendly command makes any curves SubD compatible.

- A SubD friendly curve is a degree 3 uniform curve.
- The second control points on both ends are constrained and locked. These points display with the locked object color.
- The first and last three control points are always collinear to maintain zero curvature at both ends.
- Moving or deleting Control Points or Edit Points will not destroy the SubD friendly characteristic.
- SubD creation commands (SubDLoft, SubDSweep1, SubDSweep2…) create a better SubD object from SubD friendly curves.
For more information, please refer to the Rhino documentation.