Hi, I am trying to develop a game engine/application to teach electrical engineering topics (computer networks). I have no need for photorealism in this application. I want to achieve the look of objects (models) with black outlines and shaded and also shadows, but no sort of elaborate texturing ( almost a vecctor graphics illustrative type look). If anyone can point me to resources that may be able to help me develop such a realtime rendering engine to use in the games, I would be very grateful. I am using OpenGL as the programming API. Also, I would like to be able to allow for the surfaces of objects to fade ( become transparent ) so that the insides can be seen. Together with this, I am planning to have an animation engine capable of displaying these objects and animating them to demonstrate principles such as packet flows in a network and networking protocols. I would be grateful for any help. Umesh Persad http://www.amblemedia.com upersad@tstt.net.tt

Uhm... I don''t think that''s what he''s talking about. There''s some huge NPR link site out there on the web (don''t know the exact site, just search for it, it''s not too hard to find). Jeff Lander did a column on NPR for Gamasutra, and Nvidia has a few NPR demos (with source and documentation) on their developer site.