https://www.cadhatch.com/
Free AutoCAD Hatch Patterns | CADHatch
Royalty FREE AutoCAD hatch patterns, including wood, stone, stonework patterns and seamless textures.
hatch patternsfreeautocad
https://fr.cadsofttools.com/help/cadnet/topic_000000000000061C.html
CADHatch.Visibility Property
visibilityproperty