Foliage LightMap Baking Problem

Hi! I am struggling for a few days with light build in my scene. Today, I found out that most probably problem is somewhere in FoilageTool

Part of my Foliage has wrong light build, others are completely black. I tried everything I could - vainly

Also, after building, I got this warning:

LightingResults:Warning: Warning InstancedFoliageActor_0 The total lightmap size for this InstancedStaticMeshComponent is large, consider reducing the component's lightmap resolution or number of mesh instances in this component

Left tree = Static Mesh — Right tree = Foliage Tool
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foliage_light_map_problem

Below an example of FoilageTool NOT making a black object, but flattening it:

Left bush = Static Mesh — Right bush= Foliage Tool

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foliage_light_map_problem


Here my project from few days ago, where light had no problem with rebuild despite larger amount of Foliage:

foliage_light_map_problem

And below - how it looks now:

foliage_light_map_problem


Settings of my project, which can cause issue. Same for both versions of project:

foliage_light_map_problem
foliage_light_map_problem
foliage_light_map_problem
foliage_light_map_problem
foliage_light_map_problem
foliage_light_map_problem
foliage_light_map_problem
foliage_light_map_problem


I saw this thread, but unfortunately it does not work in my case:

I appreciate any suggestions.