After years of in-house use and testing, Valve has finally release a beta version of "The Source Filmmaker" tool. This is the same tool Valve has used to make all the short movies use to promote all their recent game releases.
The tool purports to be a revolution in animated film making by turning the entire animation process on it's head. TSF tool allows filmmakers to 'play out' scenes as if they were playing a video game to get the broad of any particular scene. After the basic motion is captured, TSF then allows the filmmaker to adjust any detail including animation, lighting, camera angles, etc.