I do work with 3D visualization of scientific data a lot.
So I added the option to load that data (either obj data with material files or gltfs) and learn about the visualization used. I made some small changes the code, (e.g., adding antialiasing to the renderer -> THREE.WebGLRenderer({antialias: true}))

In the example here, you can see a glyph for general tensors (https://ieeexplore.ieee.org/document/7539639) and an explanation on how to read the glyph.

Thanks for the course, I finally had the time to look into three.js.