Williams worked at the New York Institute of Technology (NYIT) from 1976-1986 on research and commercial animation, and the development of
shadow mapping and "mip" texture mapping. Williams, acting as lab director, was also the creator of
The Works, a feature film project in development at the lab from roughly 1978-1982. The film was eventually canceled due to the lack of sufficient technology. Subsequently Williams consulted for Jim Henson Associates, independently developed
facial tracking for computer animation, worked for six years in
Apple Computer's Advanced Technology Group starting in 1987. While there he collaborated with Eric Chen to pioneer early image based rendering work, developed "Virtual Integral Holography," (with Dan Venolia), created 3D paint systems and contributed to QuickTime VR. He has pioneered work in motion capture facial animation systems for over 20 years. In 1997, Williams joined
DreamWorks SKG. In 2002 he became Chief Scientist at
Walt Disney Animation Studios. In 2006, Williams joined Google and worked with the Google Geo Group (Maps and Earth). In 2008 he was a Principal Member of Research Staff at Nokia and as of 2012, he joined
NVIDIA Research. ==Personal life==