Thanks for explanation, but there was other problem. I used Material Color Blend node to add some slight dust layer over everything. Because of this node my AO was too soft and it didn't give me results I wanted. I didn't notice it earlier, because there were other problems to solve. I had to drop opacity level for AO in…
I think a lot of people have a tendency to make their images really dark when starting out. I feel like I've just broken that habit myself. Did you add subsurface scattering to your material here? Also, did you create an ambient occlusion map? It doesn't seem like you did, and it would do your material wonders. If you're…
It's looking even better! When I asked before about subsurface scattering, I actually meant to say it shouldn't have it, and it looked like it had scattering, just wanted to clarify. A quick trick you might like; have a separate height map for the small bark chunks, and a height map for the larger shapes, then plugging…