Lack of ambient occlusion on LODs makes transition very obvious and reduces definition of depth

[Sorro123]

As you can see in the images below, there is a large visual difference and a lot of the definition of the depth is lost, for example where the coal ore is directly above the cursor in the LOD chunks it looks like a practically flat surface.
Original chunks:
LOD chunks:

[Felix14-v2]

Isn't that the purpose of the terrain rendering with reduced details?

[Sorro123]

The purpose is to improve performance for extremely high render distances, maybe AO would make performance worse but it could also be a toggleable option which could make the fake chunks look better.

[CarloskHard]

It would be interesting to see the performance hit, but I agree AO is necesarry.