(via BoingBoing, then the University of Santa Cruz website and finally to the Printing Reflectance Functions webpage)
An experimental process where a 3D object is scanned in a special manner and printed on special dimpled paper, allowing for a unique 3D illusion, where the 3D effect reacts to a live light source.
All very scientific and researchy, as it's from a paper presented at SIGGRAPH 2012, but could it have any application to flat glass art? Maybe not, but interesting to think about it. How might this work if the light is at least partially transmitted, rather than just reflected? How might some degree of translucency alter the effect, perhaps even enhance it?