Terrain Detail Option Bug

[PLebre]

Last nigth I decide to dealing with "Land Detail" options. I had it set to Med and change it to High, to see how things go.

It prove to be a very bad decision, because after the game re-start (changing Land Detail opinion requires the game to re-start), my game drops from a solid 40 fps and almost stutters free at low level flight, to a 20 fps and tons of stutters making it unplayable.

Tryed to change to LOW and to MED previous detail Land detail level, and always get 20 fps, high stutter game.

The video options are hardly bugged.

Any Advice?

Regards.


Edited: Did try to clean the cache folder, but no good.