tl;dr: reFrame is an open-source experimental camera that displays one photo at a time on a 4" six-color ePaper screen, taking 15 seconds to render each dithered image as pigments move into place. Built from off-the-shelf parts (Raspberry Pi Zero, Pi Camera 3, Spectra 6 display), it doubles as a desk frame since ePaper retains the image without power—the only way to clear it is to take a new photo. Not currently for sale, but build instructions are on GitHub.