interesting, I'm sure Aniostropic filtering was there before SP1. In any event, here's the explanation:
http://en.wikipedia.org/wiki/Anisotropic_filteringsounds complex, but as far as i'm aware it's a good thing to have on if your PC can afford it performance wise
To be honest I never noticed it before - but it could have been there before.
How does it affect the performance of the computer?
Also I remember in one of the threads before it was said that it is better to have anti-aliasing control via the graphic card software instead of within FSX itself. Does this still apply under SP1 and if so does the same apply for Aniostrpoic filtering?
I'm using a Radeon 9600 series card (256mb) with ATI Tray Tools v.1.2.6.940.
There's setting galours with and I get a bit confused as to what they all do

(might have to start a new thread as digressing from original question.