Matt Pharr is works as an engineer for Neoptica, a San Francisco start-up, where he works on interactive graphics. Previously, he was a member of the technical staff at NVIDIA and was a co-founder of Exluna, where he developed off-line rendering software and investigated applications of graphics hardware to high-quality rendering. He holds a BS degree from Yale University and a PhD from the Stanford Graphics Laboratory under the supervision of Pat Hanrahan, where he researched both theoretical and systems issues related to rendering and has written a series of SIGGRAPH papers on these topics.
Greg Humphreys is an assistant professor of Computer Science at the University of Virginia, where his research focuses on interactive visualization of very large datasets. Greg has a B.S. degree from Princeton University and a Ph.D. in Computer Science from Stanford University under the supervision of Pat Hanrahan. His doctoral dissertation "A Stream Processing Approach to Interactive Graphics on Clusters of Workstations" showed that it was possible to build scalable interactive graphics systems using only commodity components. His cluster rendering software called "Chromium" is in widespread use in research and industry labs around the world.