More ash trees: https://3dsky.org/collection/shared/5251731 

Young ash tree 10 meters high.
There are two variations of the tree in the scene - the usual one with the Summer material and without the leaves with the Autumn material.

The scene is clean, the render is fast, the geometry is in order, the names are not in Cyrillic.
For more realism, three normal maps are used via CoronaMultiMap, which possibly slows down the rendering. For distant angles, you can assign any one of the three maps without CoronaMultiMap.
Leaf materials using opacity.
Displacement maps are missing.

Max file weight - 127 Mb
Textures weight - 48.5 MB
Number of triangles (Editable Mesh) - 1 886 794
Number of points - 1 976 390