You are right. I think some of the later ones added more technologies. This is what it says on the site
"What technologies do you use?
The simplest ones are just made with HTML, CSS, and SVGs. For the 3D looking ones I'm using WebGL through three.js. Three.js has certain 3d shapes, such as spheres, boxes and planes, built-in which I use a lot with modifications. I'm adding color and textures to those shapes by coding fragment shaders."
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You are right. I think some of the later ones added more technologies. This is what it says on the site
"What technologies do you use?
The simplest ones are just made with HTML, CSS, and SVGs. For the 3D looking ones I'm using WebGL through three.js. Three.js has certain 3d shapes, such as spheres, boxes and planes, built-in which I use a lot with modifications. I'm adding color and textures to those shapes by coding fragment shaders."