[mrguyorama]

The N64 had a fully unified memory architecture, and weird custom silicon that also happened to be a fully programmable GPU kinda device. For decades, all N64 emulation was done by translating calls to that GPU (called the RDP) to openGL or DirectX calls, and that works horribly, but anything else would have had awful performance. Several years ago however, someone decided "Fuck it" and created a fully emulated version of the RDP that you could run, ie feed it real N64 instructions and it spits out pixel values. It was significantly slower than the translation approach, so you had to have like a powerful 8 or more core CPU to run it well.

Some other madlad then took that approach, and ported it to a GPU Shader, because fuck yeah thousands of cores! It actually greatly improved the situation, as you didn't need a super powerful GPU, just a somewhat modern GPU.

That development means devices like the steam deck actually have zero issues running awesome N64 emulation, including allowing for upscaling to much higher rendering resolutions without artifacts because you are literally telling a virtual RDP to do it, and it happily complies.

Before AngryLion and ParaLLEl, we were stuck with basically the same graphics plugins, glitches, and tweaks as the late 90s.

https://www.libretro.com/index.php/category/parallel-n64/ for a more detailed description of how this changed things.