How Do They Make Baseball Cards / Kellogg's Baseball Cards?

I've seen a few items listed as proofs or part of the process used to make Kellogg's cards.  Does anyone know how this larger image is used in the production of the cards, if at all?

I've yet to find a Kellogg's or Xograph employee to talk about their history, but there certainly must be more information about how other companies produce their cards.  This card was produced by Visual Panographics since Kellogg's didn't use Xograph in 1973.   Without the 3-D effect, this card was probably produced in a similar fashion to Topps cards from the 1970s.

If anyone has a link on this subject, please forward it.