Well, you have several ways to workaround that problem. My advice is to use a skysphere with a sky texture surrounded by the hollow block, you can find a good example in the AU resources link in the main page, under demos called Outdoor by lennart
, just an example.
Another possibility its to render a high quality sky texture in a program like Terragen and save it as sky+6.tga for example and use it in the sky cube. There are tutorials about that matter, just search them in the forum
.
I hope it helps.
BTW: search for Steempipe´s Whitepapers tutorials.