Actually the contrast is correct: the more distant objects are lower contrast and lighter. It gives a very good sense of atmosphere. Although I agree that the whole thing is probably a bit too noisy if you were going to use this in a game. Sometimes large areas of texture are best summarized with a carefully few placed patches of detail rather than showing every single rock and pebble, brick and leaf. That way, as Emtch said, you will be able to direct the player's attention to the most important things on the screen.
