https://www.youtube.com/watch?v=uzWfIk0z4z8
The material is part of a new addon 'Crack It'. So it is better to apply the material on cracked objects by the addon.
But in the file, I applied the material on simple objects from icosphere.
Blog post: Blender: Procedural Tree Material with Moss.
Amazing! I didn't think tree bark could be done procedurally, but I was wrong. Great job.