From Valve Developer Community
Faceposer playing back a complex scene with multiple actors.
Faceposer is the SDK tool used to produce choreographed sequences for the Source engine. It creates facial expressions (including lip-syncing) and manages skeletal animations, the position of actors in the world, and any map triggers that need to be fired during the scene.
- See Choreography creation for a step-by step guide to creating choreography in the Source engine.
- See Faceposer reference for a quick-reference guide to the different parts of the Faceposer interface.