Has anyone done a study of comparing aura photos of the different aura types?

Do aura photos even function as advertised? I got mine taken once, but the photo area wasn’t sealed off energetically from the rest of the crystal store. Many of the patrons’ photos had the exact same colors in the same places on the photo. I think this indicated electromagnetic contamination of the area or the instrument making the photos.

I would be so curious to see if the polaroid camera is able to show general differences between manifestors, generators, reflectors and projectors through the shape of the aura. However, if all the photo demonstrates is color, not shape, I assume there would just be color differences between individual people.