Today only! 
$3!
AllSky is a full palette of well over one hundred skies to use when lighting levels. Lighting from day to night: Twilight, sunset, multiple times of day, multiple times of night, skyglow. Many weather and cloud types: Clear, overcast, summery, stormy, autumnal, hazy, epic, foggy, cumulus.
It consists of 117 3K resolution equi-rectangular textures. Not HDR, but they work nicely in Marmoset Skyshop.
