A few years ago I watched a several hours long special about scientists who studied the shroud for months. It convinced many of them who were skeptics to become believers.
To understand how the Vatican has mishandled the shroud and its research, read THE RAPE OF THE TURIN SHROUD by William Meacham.
I believe some top-notch physicist (a woman) studied the shroud and came up with the theory that it was sort of a mini “Big Bang”. The image is even around the entire shroud - not smooshed on the back or whatever. She called it a “singularity” iirc - where gravity is absent.
I was going to write that an absence of gravity would affect where the blood lies - but I guess the blood was on the cloth before the image was.
Oh - except still - you can’t match the image to the blood. Assuming the blood isn’t fake, it would have been on the cloth first, then the “singularity” (and the cloth in no gravity) and the image created.
I believe in Christ - saves me from worrying about the shroud.