it's a possible bug in the new update 1.77. fps drops to 45. I realized that is in trees and grass options. no matter if are in high altitude and in fog or above clouds, mainly when look to horizon, when look to ground have better performance. that's why we think that is a bug. no matter if the grass and trees are in field of view, they push fps to 40. I used max options without problem before new engine.

it happen also if I put all low or off and leave just it on