The photograph collection mechanic has been used well – arguably over-used in some games. But the photographs tend to turn up – well, just like you took them. What you really want is a game where the photos you take, and the resulting pictures have disparate elements – ghosts in the background, missing objects, weird aliens like in They Live. It could be a whole mechanic in itself, but sadly, just a nice Easter egg in the example below.
Idea from: Metal Gear Solid 2.