Nothing related to GSX, of course. The texture are either there or they aren't (if there are problems with the installation), if you don't see them sometimes, it's likely you have a problem with video memory corruption or exhaustion, either doing to other addons, or too high settings, or wrong tweaks applied, or simply bugs in your video driver.
- First try to reset your video driver settings to default. Be sure you don't use "Transparency Antialiasing" (or "Adaptive Anti-aliasing" ).
- If that doesn't work, try to update your video driver too.
- If that doesn't work, try to reset your %APPDATA%\Microsoft\FSX\FSX.CFG file, to have FSX rebuild a new one with default settings
- Be sure you apply the HIGHMEMFIX tweak to the FSX.CFG, you can enabled it with the Addon Manager too, that's the only setting that really needs to be applied.
