3D-Scanned shells

No.519977 ViewReplyOriginalReport
Anyone know of a good (free or cheap) program that can easily add thickness to a 3D-scanned STL shell?
And does anyone know if there's a parametric or half-parametric program capable of handling scanned STLs like solids?

Trying to "effectivise" the model-prep process for scanned models before printing. Currently doing everything manually every time.