There's lots of adjustments in skylab. Post an image and maybe we can help. Here are some tips... 1) You can reduce the disk size and/or horizon illusion or completely turn off the sun/moon size in the SUN MOON tab of the skylab. 2) Turn off volumetric world in the ATMOSPHERE tab. 3) Move your camera in and set a wider field of view. If none of those work, then like lore says, try a different sky.