The other day where I live I noticed a building made of tabby concrete, a type of concrete with broken oyster shells inside. Its surface was breaking, revealing the oysters incorporated in the matrix of the concrete. I've recreated it in Substance Designer and rendered it with Eevee Next. More details: https://www.artstation.com/artwork/6Nm9NN
Here is my new portfolio piece, an exploration of nine samples of ancient marble. It is made with Substance Designer & Painter, Unreal Engine (using Lumen and Substrate), and Blender. Check it here, with a lot of renders, technical details, sources about marble and nodes: https://artstation.com/artwork/yDLynK