6th Century stone material

Tiling material based on 3D scans of a "Skull House" dating back to the 6th century
Making of here: https://petemcnally.com/2018/07/25/6th-century-stone/

Material sphere

Testing 90 degree corners

Source 3D scan

Untextured test geometry

Textured test geometry, night

Textured test geometry, daylight