Just found a game, “Marble Marcher“, on itch.io that has real-time “ray-marching”, which it says is similar to raytracing. It needs a good GPU to run, as it uses fractals as a 3D landscape to roll a glass marble over towards a goal. It does look very nice, but as my computer is not super high end, and the game is not really highly optimized, it doesn’t run very smoothly on anything but the lowest resolution setting for me.

There’s also a community developed edition, which is supposedly better, but I couldn’t get it to run on my machine at all. Oh well. It was interesting to check out at least.