Recently encountered with Struffel Production on Patreon. He is creating PBR materials. The best part is that you can download these for free from his website. There are an insane amount of PBR mats: 170+ and its growing.
All of the materials on the website are under the CC0 License. This means you can use them in whatever project you want to use (even redistribute with your model), and you don’t have to give credit to the author.
The website and the work are funded through Patreon.
