Hi, last night I was playing with Fedora 6 and Beryl and used the skydome feature...
Searched for some pictures and ...
Wow!Skydome animations was smooth and I liked very much.
I found a plugin for GIMP: panorama, that should be enough to process the images.
you resultant image should look something like
this**EDIT added a screenie, and text modified because I found my original question
EDIT**