Ключевые слова: abstract, background, black, blackboard, blank, board, chalk, chalkboard, clean, dark, detail, dirty, empty, floor, food, frame, granite, gray, grey, grunge, horizontal, isolated, marble, material, mineral, natural, nobody, object, old, pattern, plate, rectangular, retro, rock, roof, rough, rustic, shale, slab, slate, space, stone, structure, surface, texture, textured, tile, wall, white,