I'm glad the discussion is now focused on the burn pattern, potential burning techniques, and carbon dating variables.

I think the revival of Jesus generated some type of internal glow. We know that Human brains generate light. Not just electricity, it's "light" in the form of ultra-weak photon emission (UPE) a.k.a. biophotons. If I recall correctly, the entire body can emit radioactive or thermal radiation. If a "divine defibrillator" was used, perhaps that's what caused the shroud's inexplicable image.