Dr. Andrew Glassner Glassner created and edited the "Graphics Gems" series and the book "An Introduction to Ray Tracing". He is also the author of the two-volume text "Principles of Digital Image Synthesis". Glassner has written a regular column for IEEE Computer Graphics & Applications since 1996. Those columns have been collected in three books, "Andrew Glassner's Notebook", "Andrew Glassner's Other Notebook", and "Morphs, Mallards, and Montages."