From The Questions
If we remove questions about God from the questions about the Shroud, the evidence becomes overwhelming. There is no need to appeal to miracles to explain the images. And claims that the Shroud is somehow evidence of a miracle, even specifically the Resurrection, is problematic.
Christian faith rests mostly on a collection of stories. How literally or metaphorically we believe and interpret these stories is a personal decision; some of us believe it is grace. Wide variation is found among many traditions and within traditions. To rely on an artifact to try to confirm what we believe is probably unwise.
Philosophically, miracle causation for the images or finding in the Shroud’s possible authenticity evidence of a miracle cannot be ruled out. We can only dare to cross the boundaries of science and objective history in this way with great care.