Hehe, not really picky, just advising precisely

Anybody can make good screenshots, no matter the computer. If your computer cannot render something correctly, then you must try to hide it, by choosing carefully the angle of view. Or the zoom ! When zooming on the aircraft, you emphasize the blurriness of the distant background textures. This happens even on the most powerfull computers. The alternative is to get the camera closer to the plane instead of zooming in. If you manage to get the camera close to the plane while maintaining the zoom at 0.80 or 0.70, then the blurries become less visible, and the surrounding world seems more detailed. This kind of tips and tricks are fully part of the screenshooting art !

Concerning the addon sceneries, not all of them will impact your performance. For example, photosceneries will not have any impact on your FPS... actually, since 99,99% of the photosceneries don't have any autogen, they can have a POSITIVE impact on your FPS