Adds more Space Age Backgrounds to the Main Menu
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Map generation and terrain modification.
For me it has disabled the vanilla background by default :s.
It's the dependency mod, "Disable Vanilla Menu Simulations" that does this. You need to go into the mod startup settings and there's a toggle to un-disable them. :)
Disable Vanilla Menu Simulations is now an optional dependency. Idk why I did not think of this before.