Pave
Use the Pave tool to create faces manually on an existing object.
- Blend two PolyNURBS surfaces
 - Close holes in PolyNURBS geometry
 - Convert PolyNURBS surfaces to solids
 
Pave an Optimized Shape
Pave a surface by placing points along the contour of an optimized shape.
- 
                On the PolyNURBS ribbon, select the Pave tool.

 - Select points or edges to define a rectangle. A PolyNURBS surface is automatically created
 - To add another face to the PolyNURBS surface, click an open edge on the surface, and then place two more points.
 - Repeat the process to pave additional surfaces.
 - Right-click and mouse through the check mark to exit, or double-right-click.