abstract
asymmetric
asymmetry
backdrop
background
basic
black
black white
contrast
creation
dense
density
geometric
geometrical
geometry
graphic
grayscale
half tone
halftone
horizontal
illustration
line
linear
linen
misc
miscellaneous
monochrome
optical
parallel
pattern
pin
pinstripes
plain
railing
simple
sparse
straight
streak
stripe
striped
symmetry
texture
vertical