scaling/overlapping and painting the inside can produce many different shapes.
iRay rendred Video of cracking degrees.

if you are interested,
https://www.artstation.com/a/10490324
Bonus: Substance Viewer for Unity3D
The code basically takes all the inputs from the sbsar file and automatically creates a unity gui in realtime and it allows the user to change the parameters in real time (depending on the resolution of course).

https://github.com/emrecancubukcu/UnitySubstanceViewer
It's been sitting on the hard drive for years. I hope it will be useful for someone. It is not completely finished as it is a hobby project.
A long time ago. . While I was reading Tomas's comic book, Habibi, the part about Islamic symbols caught my attention. I read some articles. And I used it as a sample file inside my open-source substance real-time viewer.
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Bonus: Substance Viewer for Unity3D
The code basically takes all the inputs from the sbsar file and automatically creates a gui and it allows the user to change the parameters in real time (depending on the resolution of course). It's been sitting on the hard drive for years. I hope it will be useful for someone. It is not completely finished as it is a hobby project.
Unity3D substance viewer and sbsar file:
https://github.com/emrecancubukcu/UnitySubstanceViewer
sbs & sbsar file:
market
EVOLUTION OF GEOMETRIC PATTERNS IN ISLAMIC WORLD AND A CASE ON
THE JALIS OF THE NAULAKHA PAVILION IN THE LAHORE FORT, Mahina REKI &
Semra ARSLAN SELÇUK