Ключевые слова: abstract, background, cold, diagonal, dull, flanges, folds, geometric, geometrical, gray, grey, grooved, grooves, groovy, harsh, linear, lined, lines, metal, metallic, parallel, pattern, plain, pleat, pleated, pleats, ribs, ridge, ridged, ridges, rows, runners, sharp, silver, steel, straight, striated, strokes, texture, textured,