I like to get a more in-depth understanding how to achieve large-scale nature scenes in Blender. Keeping it simple.
MTree helped me to create trees for the forest scene. After some fiddling, Particle Instance (on leaf) works with the leafs particle emitter.
I oriented to lolwel21’s feedback to rework the landscape scene.
Leafs are smaller then a fraction of a pixel. Asking myself … is it nescesary to keep leafs that small?