You need to be very careful especially if you are a novice in 3D computer graphics and happen to be very good and new to the online 3D artist groups. I would encourage you as an artist to attain from your bookstore “Legal Guide for the Visual Artist” and “Business And Legal Forms for Fine Artists” by Tad Crawford. These I think are a basic understanding of copyright laws and the artist and advise on how artists should use legal forms to authenticate their personal creations. In general, always remember that you own your art!