Hi,   Some of you may be aware of the mods I'm working on to try and enhance the lighting and skies in this sim. Part of this work has involved a lot of testing and optimisation to try and avoid slowing things down, where by-and-large my work in progress mods run at roughly the same speed as the stock game.   My tests have, however, highlighted a strange phenomena which I spent a long time trying to attribute to my mods, but ultimately felt must be an inherent quirk of the ga