Here's my latest work in Substance Designer 5, which was inspired and guided along to completion by Allegorithmic's monthly drop. I used a basic tiling stone pattern and layered in many layers of variation through procedural cell, crystal and grunge generators. Variation is key to producing realistic and satisfying results, and it is a lot of fun to mess around with the many different kinds of generators. For stones, blending jagged crystals shapes with organic cell shapes produces some great results. The grunge layers add some additional wear and tear to the surface of the stones. I think I could spend a little bit more time fine tuning the grout in between the stones, and might add some moss or mold to give the stones even more variation.
I am continuing to learn a lot from Allegorithmic's monthly drops, and can't wait to see what they put out in the next one!