It is a brush of the leaf and the branch set.
You can draw a line drawing while groping for a tool property to depict natural foliage. I think that I can line up to the tree-Li as long as it is made with 300 300 so as not to do an unreasonable expansion.
葉と枝セットのブラシです。
ツールプロパティで向きを弄りながら線画すると、自然な枝葉が描写できます。300dpiで作ってあるので無茶な拡大をしない限り樹麗に線画出来ると思います。