abstract
background
bark
brown
circle
closeup
colour
concentric
construction
cross
cut
detail
energy
firewood
forest
fresh
fuel
industry
life
log
logging
lumber
macro
material
natural
nature
old
organic
part
pattern
piece
pile
pine
process
ring
rough
round
saw
section
shape
slice
stack
stacked
structure
timber
tree
trees
trunk
winter
wood
wooden