I have been running FSX on my nVidia 8800 GTS graphics card and have been fairly happy. I changed my scenery radius from medium to large in the FSX settings. I am very happy with the improvement of the scenery experience, but have a new problem. At higher altitudes (FL 30 and above, I sometimes have a white flashing over the upper third of the screen (in all views). I have played with the antialiasing and filtering settings but have not found any resolution. Before the change, I was enabling AA and AF in the game. I had the card set to AF application-controlled and AA application-enhanced 16x (not 16xQ).Does anyone have any suggestions on resolving this problem. Thank you.Craigjjs

I have had the same experience with my 8800GTX at lower altitudes on rare occasions I suspect that it may be a driver issue but it happens so rarely that it doesn't bother me. On the other hand I only fly up to 20,000' so that might have a bearing on the issue.

Yes, you are at a visibility transition level. Change your altitude - or the weather. It is NOT a card issue.Allcott

>Yes, you are at a visibility transition level. Change your>altitude - or the weather. It is NOT a card issue.>>AllcottHuh? Little more information please. What is visibility transittion level? Why does this cause white flashing lines accross the screen?

>>Yes, you are at a visibility transition level. Change your>>altitude - or the weather. It is NOT a card issue.>>>>Allcott>>Huh? Little more information please. What is visibility>transittion level? Why does this cause white flashing lines>accross the screen?Menu World, Weather. Choose the option User-defined weather and click the button Customize. Click the button Advanced Weather. Click the tab Visibility and you may see the transition defintions for visibility layers in FSX. Don't hesitate to use the Learning Center in FSX to learn more about Weather in FSX.Ulf B

Thank you. I use ActiveSky. I will take a look at the settings.Craigjjs