Contributors  Curtis Beeson moved from SGI to NVIDIA's Demo Team more than five years ago; he focuses on the art path, the object model, and the DirectX renderer of the NVIDIA demo engine. He began working in 3D while attending Carnegie Mellon  University, where he generated environments for playback on head-mounted displays at resolutions that left users legally blind. Curtis specializes in the art path and object model of the NVIDIA Demo Team's scenegraph API—while fighting  the urge to succumb to the dark offerings of management in marketing.  Kevin Bjorke works in the Developer Technology group developing and promoting next-generation art tools and entertainments, with a particular eye toward the possibilities inherent in programmable shading hardware. Before joining NVIDIA, he  worked extensively in the film, television, and game industries, supervising development and imagery for Final Fantasy: The Spirits Within and The Animatrix; performing numerous technical director and layout animation duties  on Toy…