High-quality stuff from Imanol Delgado.

3D artist Imanol Delgado has shared a free rock material on his Gumroad page. This one is really good for those who want to learn Substance or just need a high-quality material for a rocky project. 

Get the Material

Imanol has tons of other complex materials presented on his ArtStation page. You can also contact him for some feedback or to get some insights.