Shades of Halftone

https://blog.maximeheckel.com/posts/shades-of-halftone/

One of those effects that kept coming back over and over again is halftone, the classic dot pattern, arranging dots of different sizes in a grid to give the optical illusion of a gradient of color to the observer. This technique was originally used to print images with limited ink colors, while today, it is more a versatile artistic tool used across media and the web to give some kind of texture or grain to digital outputs. I personally find this effect very interesting, as it is inherently simple to implement in its classic form, but can quickly branch off to some complex and intricate visuals.

Interactive explainer of a variety of halftone patterns, presented as fragment shaders