I went out of my way to get this copy of GPU Gems from the Internet Archive onto my e-reader and have it look good. It took me three days of messing around.

https://archive.org/details/gpugemsprogrammi0000unse

This device would be landfill if it weren't for KOReader, which renders pages ten times faster than the official app.

https://koreader.rocks

Innovative Clock Uses Printed Caustic Lens - Hackers and makers have built just about every kind of clock under the sun. Digita... - https://hackaday.com/2025/01/20/innovative-clock-uses-printed-caustic-lens/ #clockhacks #caustics #caustic #optics #clock #light

Tiny #waves and their #caustics in a shallow pool of water.

Math, Optics, and CNC Combine to Hide Secret Images in Acrylic - Magic mirrors, with an LCD panel hidden behind a partially reflectively mirror, ar... - https://hackaday.com/2021/08/23/math-optics-and-cnc-combine-to-hide-secret-images-in-acrylic/ #lithophane #mischacks #caustics #acrylic #morphic #optics #art