If you were to add a feature where it would remove clouds, (or a different version without clouds(I know its easier said than done)) Would it stop the error, or is it something to not do with clouds, IDK.
It still didn't work? The problem is shaders which this game uses a few. That download didn't fix it for you? I has fixed it for everyone I know so far.
i feel it may just be better to give up. I'm sure it's an amazing game, and I really wanted to play it, but if I can't get it to work, is there really any point to keep trying?
What operating system do you have? You installed the DirectX update I linked? Installed the latest version? Updated graphics drivers? Other then that I don't know why it isn't working for you.