Actually, Eves deLage was a French anatomist who, in 1902, studied the first photographs of the shroud taken by Secundo Pio in 1898. DeLage was an agnostic who did not believe in miracles, but he did believe, based on his analysis, that the shroud was the authentic burial cloth of Jesus. He did not believe that the image formation was supernatural, but by a natural process of vapors emanating from the corpse.
There might be something to the Malliard reaction of various decomposition products with the coating on the threads, except it does not account for the scale of the image,its being a photographic negative, nor if the images if the coins on the eyes, and it contradicts the scripture about “You will not let Him see decay.”