How to apply the effect to the whole scene?

Question

JavaScript

This is specifically about the three.js library, but since the chances that someone uses it are very small, I will be glad to answer based on the experience of other 3D libraries.
And the question is how to apply the effect to the entire scene-camera? That is, I wrote a shader that changes the color, how to apply it to the entire screen?

Answer 1

https://stemkoski.github.io/Three.js/Shader-Explor... - CTRL+U