Quite an impressive airbase !
A few remarks though, concerning your settings, you might want to change a few of them in your sim:
- I'd recommend you to disable to dynamic vegetation (a.k.a. SpeedTrees). These trees are not looking so nice, and their density is extremely low. They will make your forests look bad.
- It seems your shadows are completely disabled ? I would recommend you to enable all of the "cast" and "receive" checkboxes, excepted for the vegetation (only receive, no cast, because it's very expensive on FPS), particles and no shadow flagged content.
The shadows on ground will greatly enhance the rendering, especially for the various scenery elements such as buildings/hangars (finally your plane will be in the shadow when sitting under an open hangar
) or static planes