Material Study - Lichen

I've been wanting to dive into Substance Designer for a while now, and this study is the first graph I managed to create.
I'm sure it's far from perfect, but I'm happy with what I achieved here, and it was a great learning experience.
It probably won't be my last study, observing nature provides tons of inspiration for material creation :)

Bark material and branch asset are from Megascans, only the lichen material was fully created by me in Substance Designer.