yes, 24bit usage of color in hemis is an old request. if it will come in later patches or not, is beyond my control. as don said, all hemis are 24bit, problem is that lfs only shows 16bit info from it
now thats fine for everything else except for a case of big area/big gradient, aka clean skies
so i understand it isnt a priority (nor should it be). if it comes it comes. even as is, i prefer this clean jamaica sky by far.