A bit off subject here I know but.... Has anyone heard a recent news piece about a researcher who claims that around 1400, the late Gothic and early Renaissance period, the discovery and use of a lens to produce a camera obscura effect is what artists like Jan Van Eyck and others used to reproduce the graphic detail found in their paintings? Check out Van Eyck's 1432 painting Giovanni Arnofini and His Bride. I find this contemporary art detective work fascinating. I can't remember the detective's name but his examples of just how these tracings of projected images, similar to how one could trace an image with an opaque projector, were accomplished seems to expose a technique secretly used for centuries by many revered artists. He seems to make a fairly damning case, using early paintings to show how many of the images drawn using this technique are mirrored and therefore the finished pose shows them as left handed instead of right handed. It also answers a life long question for me as well as, I suspect, countless other artists. How did they do that?