So much for da Vinci's "camera" then. Did you see the special? I was out.
Yes. I saw it. I was disappointed.
They spent far too much time on the Da Vinci Camera Obsura canard without pointing out the obvious flaws... no silver shows up on the shroud in sufficient quantities to be visible (there is some silver, but that proably came from the molten silver that burned through the shroud in the fire of 1532), we already KNOW what the image is composed of, and the image does not show LIGHT artifacting... instead it shows contour mapping information, with the darker image areas corresponding to the distance the cloth was from the surface of the body.
No serious scientific researchers give any credance at all to the theory that Da Vinci created the shroud... Da Vinci was born much too late, unless he also invented an undocumented time machine. If he did, he would have had trouble finding a Delorean ;^)>