A tricky video this one, as after I filmed the video, I realised it’s not exactly Perlin noise, but I didn’t have time to reshoot.

Sometimes, we want to randomly generate things, but pseudo random number generators are just too random! Perlin developed an algorithm which adds local coherence to noise at different spatial scales, creating clumping and patterned noise. This is considerably more natural in appearance than just white noise, and has many desirable properties such as tesselation, and level of detailing.