Whenever Sixel comes up, I always think about this guy who wrote terminal patches that allowed for Sixel support, as well as a library (libsixel) that generates them: https://github.com/saitoha

A couple years ago, it seemed like he was on a mission to patch every terminal in existence so that Sixel support was widespread. Seriously, half of his repositories have something to do with Sixel. Back then I was still on Windows, and when he patched mintty it was kind of crazy seeing bitmap graphics in my terminal for the first time.

It seems as though he hasn't made any commits in years, though. I wonder what happened to him. I always admired his interest in pushing these graphics, however old and arcane the protocol may be.