To Create Skin

1. Right-click the fragment in the project tree.
2. Choose Create Skin.
3. Enter the number of grid cells along the +/- X, +/- Y, and +/- Z axes desired to form the skin. If you enter a hull thickness of two grid cells in plus X direction, for example, all grid cells with less than two neighboring grid cells in the plus X direction are split off and added to the hull.
4. Click Create Skin to split the fragment into a core fragment and an outer hull, or outer walls.