* * * * * The ultimate in the Droste effect and how it was made 3Blue1Brown [1] just released “This picture broke my brain [2],” a video about M. C. Escher's [3] “Print Gallery [4].” You know, this picture (curtesy of Wikipedia): [As Wikipedia states: A man viewing a print of a seaport in a gallery, with the gallery itself appearing within the print.] Like most of M. C. Escher's work, not only is the image bent, but so is your mind when you view it. [5] The 3Blue1Brown video not only goes into the math behind the print, but also presents what should appear in the blank center than even M. C. Escher himself had trouble wrapping his brain around. Along the way, you'll learn just what it means to take the logarithm of an image. [1] https://www.youtube.com/@3blue1brown [2] https://www.youtube.com/watch?v=ldxFjLJ3rVY [3] https://en.wikipedia.org/wiki/M._C._Escher [4] https://en.wikipedia.org/wiki/Print_Gallery_(M._C._Escher) [5] gopher://gopher.conman.org/IPhlog:2026/03/24/Print_Gallery_by_M._C._Escher.jpg Email Sean Conner at sean@conman.org .