How to make such an effect of drawing an image from the void?

Question

JavaScript

Hello!
Tell me how to implement a similar effect:




Implemented on this site using canvas and WebGL (pictures on the sides are drawn when scrolling, mine is on the screenshots at the very bottom in the blue section):
https://citadellegin.com/en/

Answer 1

Most likely this effect is based on Perlin noise
. You can do something like this: