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)  |