is it possible Night sky no clouds ??

Hi all

Just brainstorming a little, and thinking this is possible, but not really sure how to go about it.
Is is possible to make a night sky with no clouds permanent/ In Permanent I mean no day time sky at all, just perpetual night with a bright sun.

See this thread - https://forums.auran.com/trainz/showthread.php?164975

No clouds is an option in the Weather and Water (sun and cloud icon) setting in the Environment Tools - see Trainz Wiki at https://online.ts2009.com/mediaWiki/index.php/How_to_Use_Environment_Tools#Set_the_Sky