The only working Skybox is the extraction scene named planet_blue_sun.mdl which is present in every \models\vistas directory (except live fire maps, excluding deck). Because it is mandatory for the successful extraction phase process of every map.
To swap skyboxes simply duplicate planet_blue_sun.mdl and rename the duplicate to the name of the skybox of the map.
duplicate "planet_blue_sun.mdl"
rename the duplicate
delete the original skybox
特殊情况
Some maps have the ending _se instead of_sky. It is the exact same editing process though.
Some maps feature an additional file in the directory. Make sure not to swap the wrong ones.
什么不该做
Removing the Files will result in the disappearing of the skybox.
Renaming other skyboxes to the existing ones of the map and replacing them leads to the textures not loading in, since they are applied via a script, which is not in the VPK itself.
The reason behind this not working is because the textures are not applied via a VPK. Every map has a different VPK. Textures that are not normally on the map stay missing because the script applying them does not apply them there. Once we figured out how to edit .rpak files changing actual skyboxes becomes a possibility.
样例
Obviously this wasn't made to be the skybox for normal maps. So there are little errors all around the place.