It does this:
Ambient occlusion off
Ambient occlusion on
Save both images and flip between them in photo viewer or whatever.
Note that the right side of the screen appears darker than it should thanks to a bug with FFXIV's ambient occlusion and ATI cards. (it causes a faint diagonal "shadow" across the screen)
Edited, Sep 7th 2010 7:50am by Lobivopis