Most
of these were drawn with pen. Some incorporate paintings,
others, mixed
media, digital photos and backgrounds.
Symmetry in art has unique
calming and stimulating effects.
It is inherently attractive to the human eye and some psychologists
believe it directs our subconscious perception of time,
by converting what the eye perceives as shapes into what the mind
perceives as memory.
See article, "Symmetry, Causality, Mind," at
http://www.rci.rutgers.edu/~mleyton/SCM.htm