Check in your Aces High in-game Options menu. I don't recall which section exactly, but I think it's in the "Graphics Options" bit. In there, try adjusting the something something distance (sorry, I have no clue of its name, but it's to do with how far you can see, or something like that).
Also, try changing your visual mode things, by pressing "Shift + F1 [ or F2, F3, F4]". A message will appear in the text buffer telling you which mode you've changed to, so just try that out.
Hope that helps,
<S>
Yossarian