Here is one I still follow and submit to when I have time: www.irtc.org (Internet Ray Tracing Compitition) Here is what they say about entry: The Internet Ray Tracing Competition is an open competition. Deadline for still image submission is every two months; for animations, every three months. Participants may use any 3D rendering program. They have a panel of judges and select 1st, 2nd & 3rd place as well as Honorable Mentions for: Artistic Merit Technical Merit Concept/Theme I won one of the early compitions and got my work and code for it (done in POVRAY then) on thier first CD. Each year they take the winners and Honorable mentions and create a CD that they sale to help sponsor the web site. It's pretty cool.