How to make a CSS Cloud Scattering Effect?

Question

css

I really want to understand how this cloud scattering effect is implemented: ivanaivazovsky.life
We will be grateful for an explanation or recommendation from a specialist who can make such an effect.
Thanks

Answer 1

It's not css, it's wegl and three.js.
Of course, you can mess around with css animations, transparency, and transforms to achieve this effect, but this will cost more to site users, as it will be less productive.