Break out the insecticide.

Seriously, don't quite understand what do you mean with "airports covered with ants".

I think I know your problem. It's called NO ANTIALIAS. Remember when it happened to me after a useless drivers update. Useless because the old drivers worked fine, I am a knight of the: "if it works leave it the hell alone" and yet that time I had go and mess it up anyway.

Download Nvidia Inspector, or Ati equivalent, and assign to FS9 at least an antialias of 4X. And I suggest an as high as you can level of Anisotropic Filter without cutting (too much) on the FPS. You'll see the improvements.

What's your MIP mapping quality level set at in the sim? (settings-display-hardware tab) Drop it down a little and see if that helps. Generally speaking, 4 should be optimal in most cases.

Sorry for the lateness I answer. Do not talk bad of the Nvidia Inspector, that with the old nHancer you would be weeping right now. Read the instructions (no one thinks about reading the instructions, ever... sometimes I wonder why the coders put them there at all) and assign the FS9 an antialias of 4X.

Do not worry, if you have a decent rig with a decent card by today's standard you don't need to overclock anything (I don't. Last time I overclocked anything was... I had a Sempron 800, I seem to remember, so before the turn of the millennium), even if you go happy with antialias strength. On my Nvidia 9600GT with antialias full blast FS9 slowed down in a barely perceptible way, but there was no real improvements if compared to the 4X.

The Anisotropic Filter too, under FS9, unless you have an old card, brings away little fps.

I'm still using Nhancer at the moment and have not installed Nvidia Inspector because I conquered the old program and everything works fine now, and I'm always a knight of the: "if it works leave it the hell alone", after all.