Never been able to duplicate it exactly the way it’s on the Shroud.
Thank you --- that's quite true. Using 3-D imaging on the Shroud --- similar to what they've done with Our Lady of Guadalupe, whose Image also contains 3-D information ---- also produces new results with previously-unrealized detail, the provenance of which could not have been any presently-known human technology.
Yes, I'm going way out on a limb here, it could be an artifact. But an artifact made by someone whose technology surpasses ours, and who evidently wanted us to bear in mind Christ's sacrifice for the sake of our redemption.