Jeff has been programming since 1992 for games, television, and film. He has worked on many interactive 3D projects for a variety of clients including nVidia, Rhythm & Hues Studios, Sony, Ion Storm, Exakt Entertainment, EA, Luxoflux, and Activision. Jeff has developed game engines designed for first person shooters, third person character driven action titles, outdoor based terrain systems, and continuously streaming open world game engines. He has specialized in advanced graphic engines emphasizing real-time character animation, physics and dynamic simulation, as well as custom tools for audio and video processing. He also wrote the monthly Graphic Content column for Game Developer Magazine from 1998-2001, co-founded the Game Technology Seminars, and has edited several game programmer books.