Ключевые слова: abstract, autumn, background, black, branches, clouds, cloudscape, cloudy, concept, conservation, countryside, dark, dawn, dusk, environment, evening, forest, grey, heaven, horizon, landscape, light, lonesome, morning, nature, nightfall, oak, outdoor, overlay, park, pattern, rural, season, silhouette, sky, spring, stormy, summer, sunset, texture, tree, twig, twilight, unique, vegetation, weather,