

This is a good study example for artists to pick up some procedural shading techniques.
This shader is made entirely without the use of imported or painted maps. Instead, all maps are generated inside the shader using Maya and Arnold Nodes. Benefits of this include:
Ensure that your mesh Scale Transforms are frozen as the shader's displacement will adapt accordingly.
This shader makes heavy use of displacement. As such, I suggest you make use of Arnold's subdivision at render time settings and set your subdivision to about 5 depending on how heavy your base mesh is. This can be done manually one mesh at a time or automatically for all selected mesh using this free tool: https://www.artstation.com/yokairising/store/00qv/multi-rendertime-subdivide-arnold-for-maya
This educational example is now available for free.