Сontinuing to work on the game environment
It turns out there is a cool technique, and even tutorial for a blender3
https://forums.unrealengine.com/community/community-content-tools-and-tutorials/125884-spherical-normals-for-trees-blender?152750-Spherical-Normals-for-Trees-(Blender)=
https://simonschreibt.de/gat/airborn-trees/
and I tried it myself while it is not clear, but the difference is obvious
upd matcap make sence (shows how light works)