Obviously this is probably a rather complex topic, not that I will not try and elicit an answer anyways, but I was curious if any of you guys knew how modern atmosphere rendering is done. I look at the cry engine and ue4 and the sky looks absolutely amazing; completely realistic. Any help would be appreciated. I am merely looking for ideas and not code, I am completely capable of figuring it out myself however I would prefer not to spend the next several months trying to figure it out (if it really is that complex that is).