One of the old problems with any day/night cycle in D:OS Classic was that if the player character wasn't moving during an atmosphere transition, the transition would never happen.
But I've noticed that this issue is gone in the EE so you can have your character stand still and the cycle will work fine.
Oh, that's really cool. Thanks for the update!
DOS2 Mods: Happily Emmie After and The Noisy Crypt