Before revision: upright=.8|The Ambassadors – Hans Holbein the Younger upright=.8|The Ambassador's Skull: detail when viewed from the accidental viewpoint (from The Ambassadors – Hans Holbein the Younger) Controversy 2D symmetry was once thought to be able to facilitate 3D object recognition under accidental viewpoints.
After revision: upright=.8|The Ambassadors , 1533, Hans Holbein the Younger upright=.8|The Ambassador's Skull: detail when viewed from the accidental viewpoint (from The Ambassadors – Hans Holbein the Younger) Controversy 2D symmetry was once thought to be able to facilitate 3D object recognition under accidental viewpoints.