When I create a flight anywhere at KORD (Runway or on Stand) the AI Aircraft textures gradually disappear, then followed by user aircraft then parts of airport scenery (become greyed out) then in some cases all textures become grey. Only seems to happen with KORD.
If it happens both to the scenery and the AI, it's clearly not a problem of the scenery, but it's a generic video driver/settings problem. The scenery doesn't have any control on AI textures.
- Update your video driver
- Reset your video driver settings to default
- Reset the FS9 settings to default, by removing the following file:
%APPDATA%\Microsoft\FS9\FS9.CFG
This will force FS9 to rebuild a new config with all default settings.
If this still doesn't fix it, be sure you don't run FS9 into any of the "Compatibility" modes. Every checkmark in the Compatibility tab of the Properties for FS9.EXE should be off.