Hi :)
As stated by this request report by AbnRanger:
It can be incredibly hard to create some thickness or a shell, in 3D Coat without a tool that gives us that ability, in the Retopo Room. You can see from the video, we currently have to send a one-sided mesh out to another app that has the tool, or spend needless time trying to replicate that, in 3D Coat.
Seems soon will no longer be the case ;)
