In this video, you will learn how to optimise a forest scene in Unreal Engine 5.4 using Lumen, Nanite, Virtual Shadow Maps and Virtual textures.

Optimised DefaultEngine.ini:
https://drive.google.com/file/d/1o18Q...

1) One more tip I forgot to add is disabling cast shadows on your landscape, but it doesn't look good in some cases (I didn't do it).
2) If you are not experiencing any flickering but your lighting doesn't update quickly enough (you will know what I mean when you experience it) try:
r.Lumen.ScreenProbeGather.Temporal.DistanceThreshold=0.02
3) Don't update the lighting every frame if you have a day and night cycle.