A bit tangential to the discussion but I wanted to correct a statement above: There is one (1) documented instance of a body being arranged in Civil War photography that I am aware of. It was at Gettysburg, the classic "Home of a Rebel Sharpshooter." It was created by the photography crew headed by Alexander Gardner, a former employee of Brady's turned competitor.
Dead bodies were rarely photographed, and even more so rarely (apparently once) moved. There was another photo at Gettyburg, also by Gardner and co., where a dismembered hand is suspected of being arranged in the scene adjacent to its owner. In the first instance mentioned above, a youthful, fresh looking body (as opposed to more grisly decomposed and bloated subjects nearby) was photographed and then moved to a more compelling location about 70 yards away and rephotographed.
There were other instances of arrangements in the war, with an item moved in a frame with a body in at least one instance (Petersburg), but the "Rebel Sharpshooter" remains the only time a whole body was so known to be so manipulated. Photos of CW dead are rare, there were just less than 100 images of dead on the battlefield from, I don't know, maybe 6 or ten battles (so lots of groupings, different versions of same scene included in the total). Of those, btw, something like a third were made at Gettysburg alone.
Brady or a member of his studio (Brady didn't shoot much by then) might have never photographed ANY CW dead, except at Antietam, where Gardner, working for Brady, photographed the first CW dead on a battlefield. Those pictures caused a sensation and the immortal quote:
"Mr. Brady has done something to bring home to us the terrible reality and earnestness of war. If he has not brought bodies and laid them in our dooryards and along the streets, he has done something very like it."
I digress. But I wanted to dispel the oddly prevalent notion that 'photographers moved bodies in the Civil War all the time.'