from official forums. Also if you had bothered to look in the tech support forum here you would have found this.
so i was searching for THIS exact thing for days and i finally found it on bug report thing (someone wrote it). basically i wanted to limit the drawing distance of the ACTUAL island, to do this u need to go to
Steam\SteamApps\common\Life is Feudal Your Own\scripts\client
and open cm_environment.cs
find
visibleDistance = "10000";
and set it to 200-500, depends on how u want it, i'm setting mine to 200 for more fps but i'm limiting my vision, 500 should be more than enough for good vision, also set the ingame vision bars to the same number too. u can do it from
Steam\SteamApps\common\Life is Feudal Your Own\data
prefs.cs
$pref::TS::renderingDistanceBig = "200";
$pref::TS::renderingDistanceHuge = "200";
$pref::TS::renderingDistanceSmall = "200";
also this is known but i'm still gonna write it here, in the same file prefs.cs
change this
$pref::Shadows::disable = "1";
$pref::Video::antiAliasing = "0";
$pref::Water::disableTrueReflections = "1";
$pref::windEffectRadius = "0"; <<(no idea if it does anything i just changed it)
from 1-5 fps while moving camera i went to 30-50. i'm so happy now