abstract
background
bark
barn
branch
brown
corrosion
cortex
cracked
decay
detail
environment
forest
fungi
fungus
grain
green
hardwood
high
ill
jungle
knot
lichen
limb
line
lumber
material
moss
natural
nature
oak
old
pattern
pine
plant
redwood
resolution
rind
rough
skin
stump
sunlight
surface
texture
textured
tracery
tree
trunk
wood
wooden