I have a terrain model exported from blender(it was generated from a heightmap and has about 16k faces), in my scene there are also 1400 trees which are 140 faces each. So all up about 220k faces. When adding the trees and terrain to my scene, the framerate drops from 60 to 40ish which lead to my thinking I must either be doing something wrong or need to do some optimising. I have heard Godot is not well suited to this sort of thing currently but I'd like to try optimise where I can.
Should I be trying to reduce the faces in my terrain? Or using MultiMesh? I have clumps of tree models in forests so perhaps each forest should be in a MultiMesh? Then I have also read about whether I should be trying to load parts of the terrain in chunks.