Randomized panorama from texture pack(s)

Currently, the game displays only the panorama from the topmost texture pack's .../textures/gui/title/background/panorama_0.png to panorama_5.png. I think it would be a nice and simple addition for texture pack makers if the game first searched through subdirectories of /background/ and picked a random one to display, i.e,

/background/example1/panorama_*.png

/background/example2/panorama_*.png

/background/example3/panorama_*.png

the game would see three subdirectories inside /background/, pick one at random, and then display the panorama image files within.

Alternatively, this could be defined using a .json file inside of /background/, which would allow for the same randomization (like how block textures can be randomized by using blockstates).