i watched the film "silent witness" last night and it spoke about the
way that encoded somehow into Jackson's 3D visual, is the 'depth' of
the original body somehow. i.e. how far away from the linen was the
body. now this indicates that both the body, and the shroud are
COHERENT wrt any light being emitted from the body. this appears to be
the only way that such an image can be created.