Andrew S. Glassner (born 1960) is an American expert in computer graphics, well known in computer graphics community as the originator and editor of the Graphics Gems series, An Introduction to Ray Tracing, and Principles of Digital Image Synthesis. His later interests include interactive fiction, writing and directing and consulting in computer game and online entertainment industries. He worked at the New York Institute of Technology Computer Graphics Lab. He started working in 3D computer graphics in 1978. He earned his B.S. in computer engineering (1984) from Case Western Reserve University, Cleveland, Ohio, M.S. in computer science (1987) and Ph.D. (1988, advisor Frederick Brooks) from the University of North Carolina at Chapel Hill, Chapel Hill, NC. He was a researcher in computer graphics with Xerox Palo Alto Research Center (1988–1994) and with Microsoft Research (1994–2000). His other positions include founding editor of the Journal of Graphics Tools, founding member of the ad