As a part-time researcher of the Paranormal, Unexplained and Freaky (or PUF), I understand what you're saying - but I don't understand. Scientists have many times recreated the face of Jesus, with remarkably similar results anytime. Of course, I'm too stingy to actually buy the magazine and read the article, so I don't know how they did it.
I'm also without knowlege of how many of the strange marks are left. Looking at clouds and flames - well, that's just your imagination. After all, there must be billions of flames that don't look like anything, it's almost manditory for some to look like Old Nick Himself. As for mysterious marks left behind on windows by doves and handprints that never disappear on prison walls no matter how many times they demolish the wall and rebuild it by innocent men - I believe it to be the focus of that object's aura. The man executed wrongly for murder was hysterically angry, so when he made the grubby mark on the prison cell wall, all of his anger was focused into that handprint which remains even to this day.
Auras have not only been photographed around flat objects, but a method of photographing the aura of people's unattached arms has been developed. People with a limb less sometimes feel as if they're moving their lost limb, and when photographed, their limb's aura is in the same place they 'feel' their missing limb would be.
I believe it is the emotion of that being which focuses the aura to become a long-lasting or even permanent mark.
I also predict no one will get to the end of this post interested.
