Have Not Seen This Yet
Unless I have missed this feature somehow in the AC Series, I have Not seen a way to capture a still picture while in gameplay and then be able to use that pic as wallpaper for my PS3 or phone or computer.
For example, I'm playing as Altair or Ezio and cruising the rooftops and come to a stop - when I see the sun and city in the background at just the right time for a great frame up and snapshot of a pic!
Is there any way UBISOFT or Assassins Creed Developers can put in a downloadable feature that would allow us to take those pics on all the AC games?
You can just take a screenshot using a program like Fraps or Steam.
I always used to turn off the whole HUD and go in first person while standing still to take a screenshot.