A few months ago, Code Golf posted a challenge to users to submit programs that created 256×128 pixel images that used each 15-bit color exactly once.
Inspired by the now-accepted answer, I decided to implement my own extended version in Python. Here’s a 4096×4096 image that I created that uses every 24-bit color exactly once.
If you want to generate your own, you can get my code at https://github.com/rguilmain/painting.
richguilmain 