I thought it was unbearable too, but then I went to my vid. card's software (nvidia 6800 GT), and adjusted the gamma for all channels, while AH was running, then when it got bearable for Aces High, I saved it as "AH2", went back into the game, and adjusted gamma from within AH. It worked. Not only is the terrain clear, it is very very nice and rather gentle. Believe it or not, it is as clear as AH1 and the original AH2, with much better trees, and NO eyestrain.
So everytime I want to play Aces High, I select "AH2" (right click on desktop, select properties etc. etc.) and I am good to go. When I am through, I just go back and select "standard" which has the defaults setting.