Web3D.org has announced a deadline extension for a call for papers to the 13th International Symposium on 3D Web Technology. The annual Web3D Symposium is a major event, which unites researchers, developers, experimenters, and content creators in a dynamic learning environment. Attendees share and explore methods of using, enhancing, or creating new 3D Web and Multimedia technologies, such as (but not limited to) X3D, VRML, COLLADA, Croquet, MPEG4, MPEG7, Java3D, and Canvas3D. The symposium will also focus on recent trends such as interactive 3D graphics and applications on mobile devices. Authors are invited to submit their work (short or full papers) for review by the international Program Committee. Both research and applications papers are of interest to Web3D 2008. The papers must be innovative and contribute to the advancement of 3D Multimedia technologies on the Web. For more information please visit the Web3D 2008 Symposium call for papers home page now.