Bartosz does an amazing job of making custom interactives and animations to support his articles. It looks like he uses custom canvas with webgl for the 3d ren

Bartosz does an amazing job of making custom interactives and animations to support his articles. It looks like he uses custom canvas with webgl for the 3d renders. There are 3d engines in JavaScript like three.js (https://threejs.org/ https://threejs.org/) that can abstract some of the 3d rendering work for you.