Man, those Fallout 3 screens are incredible. Might have to give Fallout 3 another go after I finish New Vegas.
Those
are the most (and that's right, I'm not refering to "one of the most-category") incredible clouds and sky that I've seen so far in a game, excluding STALKER series & Battlefield 3, other games don't come in mind right now. They are so beautiful covering the hole screen, giving that perspective of long distance, but it also seems the color from distance is more blue than the light sky blue in front. I wished for many games to look like or have that kind for clouds. ;_;
There is one mod for Fallout NV with similar clouds but I never manage to get it right, it just didn't work. Did you used only ENB ? or with something else together as well.
Man, that looks really enjoyable.