Since the latest sim update, I have noticed quite a drastic increase in external LOD pop-in.
When looking out of the cockpit window I can now see buildings, trees and even mountains suddenly appear within the first few moments of panning the camera around, and it’s really jarring. This also occurs while using the external camera.
The sim update seems to have introduced an aggressive form of occlusion culling (a feature that disables the rendering of objects when they are not currently seen by the camera) which in turn has substantially improved performance. However I think this has also made the environment much less pleasing to explore as you are constantly seeing objects appear around you.
I am also seeing taxiway signs and airport traffic suddenly appear into view too.