Creates a contour out of a list of one or more consecutive 2D polylines and nurbs curves.
l must be a typeless node to which one or more nodes are connected, which are either of type 2D polyline or 2D nurbs curve.
The following variations of this keyword exist (some of them define the same internal structures, and are only defined to allow consistent naming conventions):
| Keyword | numbers |
| REGION | float |
| REGION_F | float |
| REGION_D | double |
| REGION_E2 | float |
| REGION_F_E2 | float |
| REGION_D_E2 | double |