We all need a low prims minimal architecture design skybox, either to live in, decorate, take pictures, make parties, open a shop, a gallery... The options are endless.
Windows are tintable from transparent to all black in synchronization and can be controlled by the owner or group or public, simply by scrolling your mouse over them. Windows also have a phantom on/off option. The buildings are of course copy and modify.
4 HelaMiyo :: Skybox Minimal Design are all at 10L$, available inworld or online: