I’ve just heard about this stuff, and somehow it is used both for generating randomised numbers and also in 3d graphics for movies and video games. As well as various other things.
I’m a bit mind blown and confused
In: Technology
It’s a way of generating “random” gradients that are still relatively controlled. This makes lots of random-ish natural things look more realistic: fireballs, forests, landscapes, plants, etc.
You don’t want true random for that type of stuff, like TV static, because in the real world they obey physics/biology/etc. and that limits how much and how fast things can vary.
Perlin noise is a relatively simple computer algorithm to generate a gradient in however many dimensions you need (2D, 3D, etc.) that looks random but is also nicely smooth and has the same scale across the features so it looks realistic.
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