How to Enable Custom Skies for the Haimiya Sky Overlay
Adjusting Your Graphics Settings
If you have installed the Haimiya Sky Overlay Resource Pack but the default horizons have not changed, your graphics options may be missing a required configuration. The pack requires custom sky settings turned on in your graphics menu to render properly. Without this option enabled, the dark gray anime backdrop featuring the character Haimiya will not appear over the Minecraft landscape.
To fix this, launch your game and navigate to the main menu or pause menu. Open the Options screen, select Video Settings, and locate the details or quality submenu where custom rendering features are managed. Look for the custom sky setting and make sure it is toggled on. If you are using performance mods, shaders, or optimization tools such as Iris or OptiFine, check their specific visual settings menus to ensure custom skies are permitted to load.
Once custom skies are enabled, apply your changes and return to your world. The dark gray anime sky texture should now properly replace the normal skybox, remaining clearly visible at all times during both day and night cycles without any annoying visual glitches.