Complex sentence: He is best known for his work in computer facial animation that includes a muscle-based model for facial animation, a physically based skin tissue model as well as a visual text-to-speech system called DECface.
Split into simpler sentences: He is best known for his work in computer facial animation. He development of a muscle-based model for facial animation including a physically based skin tissue model as well as a visual text-to-speech system called DECface.