https://www.pcgamer.com/gta-5-gets-a-cloud-retexture-mod-thats-out-of-this-world/

Grand Theft Auto 5 looks lovely in its vanilla PC state—but overhaul mods like Jamal Rashid's Natural Vision Remastered elevate San Andreas almost to the point of photorealism. The most recent aesthetic-adjuster to catch my eye is Modojo's New Clouds for Visual V. It is gorgeous. 

VisualV, for those unaware, is another popular GTA 5 overhaul project which, at the time of writing, has been downloaded over 660,000 times. New Clouds for Visual V is a work-in-progress endeavour that leans on that to retexture the San Andreas sky. The results are stunning. Look, see: