A very nice program called Rhinoceros, or just Rhino as it is usually called. I beta tested the original release through several updates, but then *sigh* they released the commercial version and my beta expired. I got the Rhino 2.0 demo off a magazine coverdisc. It is fully-featured, but only allows 25 saves before disabling itself. Since I can't afford the $600-ish it costs, I got... uh... a little bit of "help" from an old friend of mine and removed the save limit.
If I could afford it, I would buy it without hesitation - a really great modelling program. It has a very basic renderer included, but its developers highly recommend you use a good renderer like Lightwave or 3DS-MAX. A friend of mine has Lightwave, Fractal Painter, and Raydream Studio, and I am planning to give them all a go and see what i think of them.
---
This signature has performed an illegal operation and has been shut down.