FXGuide has a great “Making Of” on a pair of new TV spots created by Glassworks for the Foundation Against Cancer and Audi.

To create the metal blocks, and subsequent vehicle parts and panels, artists first had to track the prop, as well as the hand and body motion of the actor. “The stand in props were covered in tracking dots to allow us to mimic the movement of the original pieces as closely as possible,” explains lead 3D artist Nick Smalley. “Tracking the objects precisely played a major part in selling the illusion. Our CG hands also had to match the actors movements exactly to get accurate reflections and shadows. When you’re dealing with something interacting with CG so close up you can’t get away with anything, as just a small mistake would break the believability.”

via Glassworks manipulates metal and builds a baby | fxguide.