You can usually tell the images apart if you have some resolution to play with. Taking such pictures in sufficient quality takes some skill (e.g. with regards t

You can usually tell the images apart if you have some resolution to play with. Taking such pictures in sufficient quality takes some skill (e.g. with regards to lighting) that two different photographers usually end up with two different picture of the same painting. And even if you can't tell those two images apart you can often trace the image back to its origin.