I was interested in knowing how easy it would be to make "3d" screenshots, and came away pretty surprised:
Looking down into the Grand Canyon:
Looking out a bit over it (warning, high separation):
Much higher shot showing a lot of of the canyon's details:
Mt Rainier:
Mt St Helens (accidentally made using red/blue preset, instead of red/cyan, so some noticeable ghosting):
Just in case somebody wanted it (for cross-eyes, other reasons), here's the original bmp pairs I used.
http://www.mediafire.com/?vay2v3d67ki9571