https://wccftech.com/snes-ray-tracing-superrt/

Next-gen consoles beware - a homebrew expansion chip makes real-time Ray Tracing possible on the SNES.

Hardware-accelerated Ray Tracing is one of the most interesting features of the next-gen consoles and PC, but what if we told you that one crafty freelance software engineer/game developer managed to create an expansion chip akin to Nintendo’s Super FX Chip, capable of adding Ray Tracing to Nintendo’s console from the early 1990s. Yes, you read that right.