AARON E. WALSH is Chairman of Mantis Development Corporation, a development firm specializing in advanced multimedia and network technologies. An active member of the Internet standards community, Walsh is Chairman of the Web3D Consortium's Universal Media technical working group, Chairman of the Web3D-MPEG group responsible for the convergence of Web3D and Motion Picture Experts Group (MPEG) technology, co-chair of the Web3D Intellectual Property Rights group, and Web3D Liaison to MPEG and the World Wide Web Consortium. An internationally best-selling technology author, he is author of the best-selling Core Web3D, MPEG-4 Jump-Start, and XHTML Example by Example (Prentice Hall PTR) and founding Series Editor of the Prentice Hall Web3D Series.
DOUG GEHRINGER is a Staff Engineer at Sun Microsystems and a member of the Java 3D Engineering Team. He has spent the past fourteen years at Sun working on graphics software, and has extensive experience programming for all of Sun's graphics APIs, including GKS, PHIGS, PEX, OpenGL, and Java 3D. A respected expert on graphics performance tuning for large-scale applications, he has worked on a number of the largest Java 3D projects in existence. One of the first developers in the world to use Java 3D, he co-authored the original Virtual Reality Modeling Language (VRML) that is today maintained by the Web3D Consortium. An active member of the Java 3D community, Gehringer is Java 3D technical editor of the best-selling Core Web3D (Prentice Hall PTR) and author of the Java 3D Explorer companion application created exclusively for Java 3D Jump-Start readers.