>If you want  vector output from 3D models for use with Illustrator (or similar
programs), Dimensions is a great tool.<

David is right, Margaret. While this entry level 3D program is really not
up to snuff for doing full fledged 3D work, it offers this tool that none
of the others do. As you are taking a class in Illustrator, this may be
exactly what you need. The educational discount on this package is $99, so
you'll have to decide whether the output you are seeing in your class will
justify this overhead at this time.

3D rendering is a hot topic in illustration and getting hotter each month.
I use it frequently as a tool in my freelance work these days and teach it
as part of a wider program. Most of my "animation" students take this class
to learn about modeling for use in illustration. I'm excited to note that
we will be seeing a much needed focus on this area during this coming
summer meeting. I haven't heard back from Cindy with the specific schedule
yet. But from what we discussed already, I think it is going to be a very
strong program this year. Stay tuned.

Frank