The Legacy of Cemu 1.8.1b: Understanding the Mario Kart 8 Installer
: Early versions suffered from "acid skies"—extreme rendering artifacts that turned the background into a psychedelic mess of colors. Limited Hardware Support
"Cemu.exe has stopped working": Delete the shaderCache folder. 1.8.1b is very picky about corrupted transferable shaders.
Black screen after character select: You are missing the keys.txt file in the Cemu root directory. Place it there.
Low FPS: Ensure you have the Cemu hook (cemuhook_0.5.6.0 for 1.8.1b) for H.264 videos.