This is a high-definition texture pack for the game Mario Kart 64, for emulators capable of loading High Resolution textures, including any emulator using GLideN64 as video plugin such as Project64, Mupen64Plus and RetroArch as well as Dolphin using a Mario Kart 64 (Wii VC) .wad file.
The files will be hosted off of GitHub, with this README and other necessary files stored here for reference.

~/Project64/Plugin/GFX/GlideN64/hires_texture/MARIOKART64 folder.1%APPDATA%/Mupen64Plus/hires_texture/MARIOKART64 folder.
~/.local/share/mupen64plus/hires_texture~/Library/Application Support/Mupen64plus/hires_texture%APPDATA%/Mupen64Plus
~/.config/mupen64plus~/Library/Application Support/Mupen64plusLoadHiResTextures and txHiresTextureFileStorage to True. 2Use the Mupen64Plus-Next core.
~/RetroArch-Win64/System/Mupen64plus/hires_texture/MARIOKART64 folder.cache folder exists in the directory.Mupen64Plus-Next GLES3 core.%username%/Documents/Dolphin Emulator/Load/Textures (~/.local/share/dolphin-emu/Load/Textures on Linux, ~/Library/Application Support/Dolphin/Load/Textures on macOS).The path to the textures may differ and can be changed using GLideN64 settings. ↩
The respective .htc or .hts file will need to be created during the first startup. This takes time and the created file will be stored in the cache directory. Note that Project64 is 32-bit, so using .htc is going to fail due to memory restrictions. ↩