I think what my client is ultimately looking for is a way to easily display different graphics on 3D models I have created and UV Mapped without going back to me to render each one.
She would even like her customers to be able to import their own graphics and have them show up on the model. I think a 3D PDF is as close as I'll get.
You might want to check out Motiva Colimo. It's a post processing tool and doesn't act directly with meshes, but might be useful to show many different variations quickly.
Thanks for all the sugestions. I added this info to my quote for further research and consulting and they were very please. This is one of the best 3D forums on the internet!