text: Optical physicist and former STURP member John Dee German has noted that it is not difficult to make a photograph which has 3D qualities. If the object being photographed is lit from the front, and a non-reflective "fog" of some sort exists between the camera and the object, then less light will reach and reflect back from the portions of the object that are farther from the lens, thus creating a contrast which is dependent on distance.
  The front image on the shroud is  long, and is not exactly the same size as the rear image, which is  long. Analysis of the images found them to be compatible with the shroud having been used to wrap a body  long.
  The image could be compared to oshiguma, the making of face-prints as an artform, in Japan. Furthermore, the subject's physical appearance corresponds to Byzantine iconography.
  The Shroud cloth is composed of threads of a nominal diameter of 0.15 mm, woven with fibers of linen with a diameter of about 10-20 μm.
  The Shroud image is a faint  and superficial image caused by a translucent and discontinuous yellow discoloration of the fibers. In the points where the image is present, the discoloration affects only 2 or 3 fibers on the topmost part of the threads of the cloth. In each fiber, the yellow discoloration penetrates only for 200 nm in the external cell layer.