This technique will let you put clouds in a clear blue sky, without using any kind of masks. It's really simple, and effective too!
On other fronts, we've purchased a new house! We closed last Friday. There's a lot of work that needs to be done before we can move in. (It was a foreclosed property.) So I'm going to be kind of busy for a while. We're allowing ourselves two months to get it done, and get moved. Wish us luck!