Here's another way to show off your 3D models - Zebra Imaging's so called ZScape prints. It's impressive stuff they pull of on a 2D surface, doesn't matter that it's based on old school hologram technology.
These prints are made using a variety of 3D data sources -- think AutoCad and the like -- that are then rendered as thousands of holographic elements by recording laser light onto a single film-based material. The resulting images are easily viewed without glasses or spinning mirrors, and just require a run-of-the-mill halogen or LED light source to reveal 360-degree, full color representations -- akin to what a physical model might look like. Fancier versions can also be made using overlays and layering techniques to show more information. (Engadget)