This is something that's interesting to me. I love that Charles O'Rear has published a lot from that particular photo shoot. I'm curious how much of Bliss was edited since almost every article claims it wasn't. I never noticed how overexposed the clouds are. Possibly dodging and burning? I am NOT an expert on this subject, I just think it's neat. I put the alternative into Lightroom to get as close to the XP version as possible.
I'd highly suggest checking out Charles O'Rear's catalog: https://charlesorear.photoshelter.com