The first thing we can do is throw on a simple noise texture to use as our cloud cover. As you can see, that by itself is pretty boring.
It doesn’t really look anything like cloud cover. For one thing, it’s lacking that wonderful wispy quality that clouds have. For another, it’s not animated.
In order to do that, we are going to be a lot more subtle in our use of procedural textures. Meanwhile, you can see this example live, together with the editable code that generates it, by CLICKING HERE.