The implausible image of a glass globe in Christ’s left hand is far from the only rebuke from those who do not believe in the authenticity of the most expensive painting sold at auction ever. But it’s very painful. A glass or crystal ball (a metaphor for a saved world) on a walnut board for $450,312,500 almost does not refract light. A real ball of this shape would give the effect of a convex lens. A transparent object on the board looks flat. The folds of clothes behind it are not distort.