Cool! I'm wondering: signed distance fields are mostly used in graphics for rotating/resizing stamps or text in texture-form without introducing too much distortion, right? Do you have any similar use-cases for this in a spherical context? Or maybe even novel ones? Any rotating/stretching maps?

nope, but it would be nice to try something!

I forgo to mention the use-case of [checks notes] derp learning chess algorithms https://www.youtube.com/watch?v=HLRdruqQfRk&t=630s