Ключевые слова: age, aging process, background, circle, circular, concentric, cross, cross section, cut, directly above, growth, history, log, lumber industry, material, nature, old, pattern, radial symmetry, ring, rustic, section, stump, surface level, textured, textured effect, timbering, tree, tree ring, tree stump, tree trunk, wood, wood material, wood background, wood grain, wooden, year,