Panorandom
With this mod, the Minecraft main menu will greet you with a random panorama every time. Instead of a static image from the top resource pack, Panorandom chooses from absolutely all active texture packs, ensuring variety and a fresh impression with each game launch.
Flexible Settings
Through the Mod Menu interface, you can set panorama change intervals — during each new load, when returning to the menu, or on a schedule. There's also a function to exclude specific panoramas from rotation, allowing you to, for example, hide the standard vanilla picture.
Texture Pack Support
The mod works with any resource packs that have at least one complete panorama. Images should be located at the path minecraft/textures/gui/title/background/[name]_[0-5].png (six files are required — from 0 to 5). Internal organization within the pack is also supported: files can be placed in subfolders like .../background/nether/panorama_0.png.
Complete panorama image sets are automatically identified, and for these you can assign a unique overlay (file [name]_overlay.png) that will display alongside the panorama. For example, files .../background/nether_1 … 5.png are paired with .../background/nether_overlay.png. If the pack doesn't provide an overlay, the system uses the standard Microsoft one.