Ключевые слова: abstract, annual, background, bark, black, brown, circle, circular, closeup, concentric, cross, cut, forest, growth, history, industry, life, log, lumber, macro, material, natural, nature, old, organic, pattern, plant, purple, ring, round, section, shape, slice, split, structure, stump, surface, texture, textured, timber, tree, trunk, violet, wood, wooden, years,