hi @rabellogp 
i’m actually working on FPS
i have a GTX 1080 and my FPS are really less than yours (mine are like 20fps for an exterior scene)
- how many triangles have your trees and grass in the LODS?
- do you make LODs by yourself or do u use the UE4 smallprop?
- do you use 2D trees/grass for the really far meshes?