Black gesso on various papers at various sizes.
Some people do yoga, some people meditate, some go to church. I draw lines.
While this concept of illustrating parallel lines as a method of focus is a practice I continue, this specific series was something of a fluke: all lines were single brush strokes with the only 'rule' being no two can touch. The resulting series of work was 12 full-frames of varying intensity & sometimes disorienting optics.
There's a practice run to this series done with sumi ink featured as a section in Out of Mind.