Controls whether closed splines and NURBS surfaces are generated with periodic properties to maintain the smoothest continuity at the closure point or seam.
| Type: | Integer | 
| Saved in: | User-settings | 
| Initial value: | 1 | 
This system variable controls how new and existing closed splines are generated in drawings.
| Value | Description | 
|---|---|
| 0 | Generates closed splines and NURBS surfaces with the legacy method used in the 2011 and earlier releases. | 
| 1 | Generates periodic closed splines and closed NURBS surfaces, for the smoothest (C2) continuity. (recommended) |