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so this uses GPU-accelerated rendering with OpenGL. TBH I have never used OpenGL and when I read "GPU-accelerated XYZ" this still sounds like magic to me because I've know idea how this works. Could you point me to some resources where I can read up on this stuff? if this helps you: I am not a newbie, I already know C, C++ and Rust, but I haven't done any graphics programming at all yet. For example I only have a very rough idea what shaders do.

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I learned this stuff a long while ago, but I found a promising textbook for you to review [0]

tldr; the "easy 80%" of the effort in GPU rendering, specifically, is reformatting graphics data in forms that the GPU prefers. (The "hard 20%" is dealing with confusing APIs, broken implementations, etc.) Graphics techniques themselves may apply various mathematics(geometry, trigonometry, a little bit of linear algebra, DSP), either on the CPU or GPU. To render things you make decisions about the processing and output format and write data and algorithms accordingly.

[0] http://math.hws.edu/graphicsbook/

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