The first one is just cool 8-)
For your clouds tests, I suggest you to install some alternative clouds with fs SkyWorld 2004 (freeware) because those clouds, despite the nice colors, are really ugly :-/
Once you've choosen some nice sets of clouds with FS SkyWorld, I suggest you to set the weather modification slider to "Medium", and then fly for half an hour or so. Very often, you'll get some very interesting results
