These demos tend to make heavy use of raymarching, which is an alternative way of representing geometry that doesn't rely on polygons. This is why these demos a

These demos tend to make heavy use of raymarching, which is an alternative way of representing geometry that doesn't rely on polygons. This is why these demos are often so small; they generate 3D scenes using what are known as 'distance field' equations, rather than loading in the polygon data from some external file (like a gltf). Basically, you'll need to learn to write shader code if you want to replicate this. A good place for beginners to start is The Book of Shaders[0]. It doesn't mention raymarching specifically, but it will give you the building blocks to understand it later. Once you have a basic understanding of shaders, check out the site of Inigo Quilez[1] to learn more about raymarching and distance fields. [0]: https://thebookofshaders.com/ https://thebookofshaders.com/ [1]: https://www.iquilezles.org/www/index.htm https://www.iquilezles.org/www/index.htm