You can only take snapshots in Character Creation mode ~ if you have a PS3, you may do so by pressing the PS button on the controller, scrolling to the left till you see the Photos category, then scroll down 3-4 options and there should be a "Take Snapshot" option. Press "X" on the option, see the screen clear up, and then just press "X" again when you see the shot you want to snap. :3
The output is 1280x720 as a .png file. owo
It's a nifty feature, but I wish we could change the scenery/background stage like in SCIV. :<
The limitations are that you can only have vertical camera movement (you can only move up and down by pressing L2+R2 w/D-pad; no horizontal) ~ and the R-stick moves the camera around and changes the angle.
Also, you don't have access to every pose/animation that the characters have.
I'm not sure if Xbox can take snapshots, so you'd have to ask someone else, but I hope I helped a little. XP