imageColin Berry writes:

I suppose I should be grateful to "co" in one respect, however,for bringing to my attention the remarkable work of Irene Corgiat with her "electric pyrograph tool", to produce a remarkable likeness of the face on the Shroud.

I have just this minute uploaded her pyrograph into ImageJ sofware to check it out for "encoded 3D information". The result is reported and briefly discussed as a postscript on a recent post on my own site re what I call "scorchography’:

I had forgotten all about Irene Corgiat’s image and the other Leonardo da Vinci theory. And thanks to Colin for doing the ImageJ 3D work shown below:

Do read the article in WWWoodcarver, Volume 7, March/April 2003.