pixelated

[Doc_uk]

Title was ment to say pixelated sky
settings are 1920x1080
most other setting are maxed out
So can anybody tell me why when ever i look up, from my cockpit the sky looks like this:confused:
http://img821.imageshack.us/img821/7248/unled1bp.jpg (http://img821.imageshack.us/i/unled1bp.jpg/)
regards
Doc