It is really hard to describe the difference cloud shadows make -- unless you spend some time flying in different weather/times, you don't really appreciate what an improvement these are over previous sims.
These shots were all taken within a few minutes, when everything was being alternately lit up by the sun appearing under the clouds. The last shot shows how the sun can light up the glass, the effect is amazing.
The movement of the light, shadows, and turbines can't really be shown in a still shot, though. I would have recorded this, but I was very aware that my aircraft was playing up...



