Navis "Presenter" is what you are looking for, I think it used to be a separate add-on but it was included with my Navis Manage.
BUT... I have had better results using Autocad for rendering. It has come a long way in my opinion. It takes a little more work than using Presenter but I like the results better from Autocad.
Also, Presenter has a lot of predefined materials and lighting schemes that are very easy to use so if you aren't familiar with Autocad's rendering, Presenter is pretty straight forward to use.
Another thing to think about is the cost, you already have Autocad, Navis is pretty expensive if all you are going to do is render with it.