SkyMaxx Pro v4
[SMP 4.6]

I can say just by flying with these for an hour it has excellent clouds and skies!! this is far better than default clouds and has almost no performance lost (in my case it's like with default you get 30 fps and with this you get about 27~28 fps with overcast settings) i would definitely recommend this for those who want better cloud and overall weather in their x plane world.