This is a mod that raises the vanilla skybox texture to 8K resolution. * It is not a mod that adds new textures.
I think it is much cleaner than vanilla, such as scaling up to 8192 using AI and removing noise. I don't think you can see much difference in the photo, but it is quite different compared to the actual one. The resolution is increased, but I think there is almost no effect on the frame rate. It cannot be used in conjunction with other graphic mods. Please understand that it is only a "mod that increases the resolution of the clouds" with vanilla graphics.
Tested with ATS 1.48.