If you lose your marbles, just create your own in Photoshop 🙂

A group I belong to has been having fun with an old tutorial for creating planets, glass balls, orbs;
whatever you want to call them. Depending on the subject matter, they can turn out really interesting.
You can’t predict what the edge color will be except if you have predominance of one color.
The most fun can be had with a skyline of buildings against blue skies or a night sky.
In that case, the buildings can have the apperance of projecting from the sphere. It’s very cool.

Whatever you come up with, the process is just plain fun! Here’s a link to the original tutorial: http://photojojo.com/content/tutorials/create-your-own-panorama-planets/