Shells
 
 
 

Shells are a special type of surface or collection of surfaces you can use for special modeling operations, or for export to solid modeling packages.

Shells are collections of adjacent NURBS surfaces. Every surface stitched into a shell must meet the edge of another surface in the shell at some point.

Shells are stored as a single node in the DAG.

Shells can be open or closed. For closed shells, the normals should always point outward. This is necessary for the Boolean operations.

The main uses of shells are:

Shells have the following limitations: