After an email exchange with the lead author, I just rendered one of their demo datasets using my Datoviz GPU rendering library [1]. It looks nice and it's quite fast. I'm just rendering uniform triangles using standard 3D rasterization.

https://github.com/user-attachments/assets/6008d5ee-c539-451...

(or https://github.com/datoviz/data/blob/main/gallery/showcase/s...)

I'll add it to the official gallery soon, with proper credits.

[1] https://datoviz.org/