Hey Alan, how about a example of how you would adjust the sky with Topaz Adjust?My favorite tool for skies like these is a filter from Topaz called Topaz Adjust. There is a new version of it that works inside of Topaz Studio called Precision Adjust (if you own the standalone Topaz will give you the new Studio version for free). The slider called Microadjust can tease some amazing details out of clouds. I often use this in conjunction with masking layers for skies like these. The Clarity slider both as a brush tool as well as overall is the closest thing Adobe has to what Topaz is doing although comparing the two is like the difference between stone tools and a surgeons blade.