I have a cradle for modeled for charging station. This model was made using a offset surface of the device itself. I then created the envelope of the charging station itself. I want to know how I can go back and fill the interior of my surface model so it is not a hollow cavity. For any Creo users out there it would be the equivalent of the fill tool. In solidworks though the fill tool acts as a boundary blend in Creo. Which is not what I want. Thanks for the help in advance though.