abstract
annual
background
bark
brown
circle
closeup
cross
cut
detail
ecology
energy
environment
firewood
forest
forestry
fuel
grunge
industry
life
log
logging
lumber
material
natural
nature
old
outdoors
pattern
pile
raw
ring
rough
saw
section
shape
slice
stack
stacked
stump
surface
texture
textured
timber
tree
trunk
wallpaper
weathered
wood
wooden