No new info, no pigment or dye on the cloth, and blood stains came first then the body image.
The draping theory only addresses what an image would look like on cloth based on cloth draped on a body or sculpture and the resulting cloth contact points with a body would look stretched out when flattened. However the Shroud is like a photographic negative capturing data of a physical body where both the body touched cloth and where the body didn't have to physically touch the cloth and from that being able to generate depth data and a 3d image from the flattened out cloth (like a photographic negative) that doesn't look stretched out.
Described here https://youtu.be/W7gl5PscRNM?t=481
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