The laws of perspective are rooted in geometrical optics and not, as widely assumed, in rules and conventions of “realistic looking” painting, nor in the art of delineating 3D objects onto a 2D planar canvas, paper or screen.

What physical laws and facts actually define and determine perspective? Are these real physical laws, or just theories or only conventions? Are they demonstrable or hypothetical? Are the laws actually correct? Are they confirmed in reality by common sense? Are the applications of any such laws, fully understood and correctly practiced?