About the Truchet arcs, 8 by 8 scatter 29 hatch pattern
Scatter 29 of the Truchet arcs: quarter-circle tiles in a fixed 8 by 8 scatter, arcs wandering into loops across a seamless repeat. Open line hatch.
Kind: a repeated motif that does not fill the plane.
The download is one AutoCAD .pat file. Downloads are metered; a Hatchy Pro license lifts the limit.