Howdy,I have a Radeon 9800 Pro 256 that seems to be working very well for me in this sim (does have the "normal" issues with FS9, but otherwise great!). I have set my Direct 3D settings to AA = Application Preference (and have it deselected in FS9) and AF set to 4X's with the preference to Performance.My question is, for FS9, should I be setting these same preferences in the OPEN GL dialogue window as well? Does FS9 use OPEN GL in any way?Many thanks for the help.Glenn

No, MSFS uses DirectX. X-Plane uses and is very proud to tell anyone who will listen to use Open GL.

Thanks very much for this :-). Appreciate the feedback.Glenn