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I love Eschers works. A few years ago I watched an documentary about his in the cinema, but I can remember the name.<p>3Blue1Brown just released an amazing video explaining the geometric transformation for Eschers print gallery. This made me try to reimplement the effect as WebGL shader [1].<p>It was very much fun especially doing it fully on my own just based on the general idea without looking at actual existing implementations. It highlighted for me how in non-linear transformations even small mistakes on my side can have huge negative effects on the final image that are tricky to pin down due to the non-linearity.<p>[1]: <a href="https://static.laszlokorte.de/escher/" rel="nofollow">https://static.laszlokorte.de/escher/</a>
I have two of his original drawings/paintings here at home on my wall. I live in Lund, which he also did for a while, so it’s pretty common to find them in art stores and auctions for pretty cheap.