The newly restored outer panels of the Ghent Altarpiece by Jan Van Eyck - whose epic rescue during WWII was told in George Clooney's "The Monuments Men" - was one of many highlights in the recent Van Eyck. An Optical Illusion exhibition in Ghent.  Join Till-Holger Borcher, one of its curators, and Nicola Jennings for a discussion about the great Flemish master's revolutionary ability to depict both the natural world and the transcendent.