Ключевые слова: abstract, age, anniversary, background, biology, botany, brown, build, carpentry, circle, closeup, concentric circles, construction, crosssectional, density, details, ecology, environment, forestry, forests, heap, industry, logs, materials, nature, object, pattern, pile up, pine, plants, poplar, resources, ring, rough, round, rural, slice structure, stack, surface, texture, textures, timber, tree trunks, trees, wallpapers, wood,