I’ve been experiencing this for a few weeks now. FPS is otherwise very good, but a repeatable framerate spike when rotating the view inside or outside the cockpit (seems to be every time the sun is directly behind the camera).
It only happens at ground level and seems to be reduced when far away from towns (tried PG on/off and makes no difference). It can be eliminated by running Terrain LOD at minimum (10) and terrain pre-caching at Low, so it must be related to buildings. My guess is something to do with how the sun casts a shadow with a large amount of objects in cache, but turning shadows completely off does not fix the issue so it may be something else.
Wondering if the new Beta has addressed this. Seems to be a common issue and is definitely caused by an issue with the sim, because otherwise my FPS is very high and fluid. It’s just the frametime spike when rotating the camera at ground level as per SubtotalGuide81 video.