From VDC Project Coordinator Pierce Reynoldson:
Timbrel vaulting modeled with TNA software and constructed using CNCed cardboard formwork from custom Rhino script. Or, in plain English, traditional tile vaulting designed and constructed with cutting edge technology.
Block Research Group’s Freeform Catalin Thin-Tile Vault:
After the construction video there is another video (Voussoir Geometry – Planarization Strategies <http://vimeo.com/32849267> ) that shows a tessellation script at work in Rhino. There are more videos in the link as well.