Rosettes and Revelations Pt.1: The Holy City - Koen Gheuens and Cary Rapaport

[pedestrian]

The moment to hash out this question might already have passed, but perhaps the word Mark is looking for could be hatching (finely drawn parallel lines) rather than hashing (chopping up food, or using a computer function to map variable length input to fixed length output)?

Sorry, don't mean to make a further hash of this thread.