It’s great that you “play” with all the possibilities that exist (and don’t exist, yet 
) to produce different effects. There are countless combinations in the different materials to create nice effects, remember to document them for yourself in the material library with comments. With a little bivax, your Indian shield will look even more rustic, nice.
I can also see that you have taken into account the fiber direction of your material, it looks so much better than if they randomly cross at an incoherent angle - in my opinion.
Well done.