Change
MeshShowLod=0 to
MeshShowLod=1 in the
[core] section of the
conf.ini file in
\My documents\1C SoftClub\il-2 sturmovik cliffs of dover.
Be aware that the game will be moving more things on screen so you'll probably get less fps.
http://forum.1cpublishing.eu/showthread.php?t=28085