Simple Shell Tool Options

The following options are available to control how bodies are shelled:


Inside	Remove material inside and leave a thin wall to the inside of the original body.
Outside	Remove material inside and leave a thin wall to the outside of the original body.
Thickness	Enter a value for the shell thickness in model units.
Keep original bodies	Create a new shelled faceted body and retain the original body.
Infill Type	Choose the type of infill structure to be created for adding strength to the shelled body when it is 3D printed.
Basic Infill	Choose the type of infill structure to be created for adding strength to the shelled body when it is 3D printed.
Use density attributes	Allows you to create variable Lattice Infills that distribute material based on the Density Attributes from lattice optimization workflows in Workbench. More material is concentrated in regions of high density and less material is in low density regions. Note: This option is only available when the model contains Density Attributes from Workbench.

A simple block will be shelled.
Using the Select Geometry tool guide, the top face is selected for removal.
Click Complete and the block is shelled with the top face removed.
You can also select facets to remove from the shell. Here, instead of removing the face, only the selected facets will be removed.
Now the shell is a little more interesting.