Ключевые слова: aging, angle, backgrounds, bark, below, blue, bottom, brown, color, coniferous, deciduous, effect, environment, europe, fir, forest, green, ground, grove, growth, high, horizontal, lumber, natural, nature, needle, outdoors, park, pattern, perspective, pine, rough, row, silhouette, sky, solid, spring, spruce, still, strength, tall, texture, tree, trunk, up, view, wide, wilderness, wood, woods,