Menu background

Today I was looking for a nice wallpaper of Age 1 and had find that:

Does anyone know where this comes from and/ or how to adjust it? Or is this a fake?

Many greetings.

Not fake. That was the menu background in the beta.
I don’t know if it can be changed.


Probably not at all, since there is unfortunately no function for such a thing in this one. But thank you.