Hi,

it means that you can give objects thickness/walls. You can find it unter Contruction->Offset.

Look at the picture for shell examples.



1. Object without Shell.
2. This is what you get when you use Shell. The object now have walls.
3. This is what you get when you select one face before executing the Shell command. The Object is open where the face was before.
4. Here i selected 3 faces before i executed the shell command.

Strength was set to 1 for all Shell examples.

MfG
sk2k

Sorry for my English. :D