The concept of a cloth falling into the underlying body region and receiving an image, in essence, requires that two separate assumptions be made. First, we must assume that the body became mechanically "transparent" to its physical surroundings and, second, that a stimulus was generated that recorded the passage of the cloth through the body region onto the cloth as an image. With regard to the latter assumption, it is unclear in an a priori sense what to assume for the physical nature of the stimulus. However, we at least know that it was able to interact physically with cloth; otherwise, image discolorations would not have been formed. I propose that, as the Shroud collapsed through the underlying body, radiation emitted from all points within that body discolored the cloth so as to produce the observed image. As will be seen below, this assumption  explains the superficiality of the Shroud image and, perhaps, the differentiation in fibril coloring.
— John P. Jackson
"Cloth Collapse theory" to explain the origin of the Shroud’s image is, in my opinion, one of the most important things ever written about the Shroud of Turin. This is because it claims to, and I agree that it does, "explain all image characteristics found on the shroud image."
And now for the video: yes, that is a nose you are looking at. It is Jackson’s presentation of his hypothesis at a St. Louis Symposium in the video, "What is Missing? " You will need to download it in WMV format from Shroud University. It runs a little bit over an hour (1:18).