I've read alot about Sky Domes lately, with regard to Raytraced Reflection/Refraction; but I have still not yet created one for myself. 

Here is how far I've gotten with just Poser 6!  I am very pleased with this WIPs promise of reflectivity!  I think it looks hard and shiny!

Basically this scene has 3 Ball Hi-Res props(2 Dome, and one Mirrored Ball.) As you can see the Cloud Dome is semi-transparent, hence the need for a bigger Sky Dome outside.

FYI - This was all rendered with 3 Raytrace bounces.

Next I'll explain how I got started, and then where I think I'm stuck.