Pattern background I made after following a tutorial that showed how to use p5.js to create a generative system that randomly creates unique crystal-like shapes, like the ones you see in the image. After the shapes were done, I imported everything in Photoshop, added a few effects, and that was it.

If you're curious to see the tutorial, here's the channel of the person who made it: https://www.youtube.com/user/matthewepler/videos