Here's some links that show how the sky would look. I think a webcam will work fine, either offset (doesn't show in reflection) or right above mirror (will show in middle of reflection)

http://chickenlickenscreations.blogspot.com/2012_05_01_archive.html

http://www.flickr.com/photos/dgrendon/3504230485/

A mirror globe also works, but the quality is not as good

http://www.flickr.com/photos/49776511@N00/1261096930/

Last edited by soylentgreen; 10/29/12 06:29 PM.

I'm just one of the many: "useless eaters", "cockroaches", "cattle", "sheep"... take your pick.