abstract
alloy
aluminum
background
border
break
brush
cold
concept
copy space
crack
cut
design
edge
fracture
frame
futuristic
gray
green
grunge
hard
heavy
illustration
industrial
industry
iron
ironworks
layout
metal
metallic
montage
old
panel
pattern
plate
polish
rend
rupture
rust
sheet
shiny
silver
space
split
square
steel
template
wall