The Sleepers is a short WebGL experience I created as a submission for Bruno Simon’s Three.js challenge. Building for a challenge like this means working in your own time, for free, and against a tight deadline. That naturally pushes you toward one thing: efficiency. This case study explores a collection of simple, lightweight WebGL techniques that are quick to implement and built for performance. The goal wasn’t to create the most technically complex experience, but to achieve the strongest visual impact with the simplest possible solutions. Let’s break down some of the techniques behind it. The Intro: Swirling Transition To create this transition, we’ll first need a black and white texture, such as this one: Then, we use this texture as a uniform in a post-processing shader to control how the scene progressively transitions from a dark grayscale version to its original colors.…