There is not that much to it, but I've explaied it a few times recently.  Search this forum, for Sky Dome, and me, then sort by date.

This is a good example of when you would want to use a Sky Dome and the Raytracing , VS. a Reflection Map, becasue you want  a Figure to Reflect, not just a background image.

Acadia...That was your thread on Diamonds...I'm the one you asked for my Tiara scene file...you still hav'nt shown us what you've done with it...and I've asked you about this before...