Given the unbelievable opening weekend box office of American Sniper, this photo series titled Camouflage is timely. Simon Menner worked with German military to stage scenes in which a sniper or soldier camouflages themselves. Can you spot the sniper in these without any clues? In every photo, the sniper is taking aim at the viewer/camera.
If you click through to Menner's site you get clues to help you find the sniper, but even with those I really couldn't spot them that cleanly. The most visible element is usually the round end of the rifle barrel, but without a red circle over them I have no idea if I've spotted the right thing.
In the movies like Blackhat or American Sniper, the telltale giveaway is always a brief flare when the sun hits the scope on the rifle or binoculars, but without that I have no idea how you spot them short of superhuman vision.