Sky/Sun Textures don't stick after entering/exiting building

[FlappyPannus]

Have a very stable FO3 load order, everything works great with one exception - any sun/sky texture placers that don't use an ESP.

 

When the game is first loaded, it works fine. For example I'm using DC Suns (not the full DC moods with the ESP), and when I first load up the game there it is - the beautiful sky and glaring sun corona. Can fast travel to various locations, all fine.

 

The minute I enter then exit a building though, it's gone. Tried with several other Sun mods, same behavior. Of course did the usual archive invalidation etc, using FOSE and 4GB patches of course. Tried it with just the Sun mods and nothing else, same deal. This only occurs with Sun/Sky textures, every other texture works fine.

 

Anyone else ever seen this?

[Deleted1205226User]

I regularly experience something similar with custom sun and night stars but haven't found the cause, yet.