A small collection of BPR materials built straight from the rocks in my own backyard. Every texture starts as a real photograph, then tiled and cleaned in Krita, pushed through GIMP for any color, or geometry corrections, and adjustments, then ran through Materialize for the full PBR stack. The hexagonal shapes were difficult to get a handle on for tiling perfectly, so a black and white making template was created in free CAD so that the pattern can repeat, then imported to Gimp for masking the hex shapes.

Wife thought it was silly, a grown person taking images of random rocks in the back yard.

If you look closley there is some scruddy grass in between on the "C" variant, this was taken from another existing material "Scruddy grass"
https://www.killgorack.com/PX4/index.php?ap=Assets&cn=det&id=13