I gave a few classes at Cergy Pontoise University last month and made this shader as an exercise for procedural surfacing.
I’m making it available ( CC-0 ) : http://cyn-prod.com/projects/wood.php
It includes paramters for dust, with dust accumultion in grooves, stains, of course color variation, bump, scale…
I’ll try to update it with improvements, although I know a procedural wood shader isn’t new and there are very good ones available already.
It outputs PBR maps for the Principled BSDF node and displacement for microdisplacement.
Hope it can be useful to anyone!
Let me know if you see ways to improve it. I’ll probably upload to blendswap when I’ll be sure quality is up to a good standard.