Hybrid Material workflow:
Started with making the Barnacles. See breakdown image for the workflow. Once I have the barnacles detail that I want I used a tile sampler to scatter them across the surface. I then approached the material by working on each element separately. I start with the wood grain, add in the planks, then add details to the wood such as the nails for the planks and the Grime.
I then create a Moss material to add on top of the wood.