When I posted my 3D Heart tutorial on the FriendlySkies forum (AoI's version of the Dome), one of the readers liked the idea of leaving the faces faceted, giving the object a 'cut stone' appearance. In the course of the thread, it was pointed out that an AoI user had created a Diamond plugin and made it available on the SourceForce Forum for AoI. Here's the link to the plugin:
http://www.ferra4models.com/MyAoI.jarJust save it to your AoI plugins folder and restart AoI. When you look under the Tools Menu, you'll see the Diamond plugin, as well as Camera distortion and Displacement distortion options. The other options are for animation purposes; haven't experimented with them yet, but here's a quick diamond render:

Have fun!