@ Jimbuna, after a lot of work on the SHIV Scene.dat file there is a setting for viewing distance & changing this by 1 (negative or posative) the sky goes black, one of the reasons it's stuck on 9k!

Also if you run GWX SHIII scene.dat 8k but use the 16k Env skycolor the sky will turn black, it has to do with viewing distance!

Another part of changing the SHIV viewing distance (another setting), vieing from a great hieght shows the world as being flat & square, boats would fall off the edge, maybe this is how it should be, Christopher Columbus may have been wrong!!