I changed the material of the leaves, so now it uses only the alpha texture and I combined the principled BSDF with translucent shader. I modified the overall look of the leaves, so now it’s both the previous convex meshes and flat planes.
I also changed the trunk’s texture to make its colors more vibrant and stylized and now it uses only 3 textures – color, roughness and normal.
I have to admit, those 4 weeks flew by so fast, but I had a lot of fun. I think I’ll need to tackle on creating stylized assets more in the future.