Interesting. Awhile back I heard a theory that the image was made by energy moving through the cloth (as Christ was resurrected). I suppose they are assuming that the energy is what caused the reaction, energy that would have been contained to the form of the body and act in a more directed fashion, rather than a diffuse fashion like gases would be expected to behave.
It's all very fascinating, but the science sometimes gets over my head. Thanks!
You said the science gets over your head and I agree fully. I have read some of the scientific articles and they lose me on the first word.