abstract appearance architectural architecture background basic brick brick-wall bricks color colored colors colour coloured colours crack cracks craked exterior external rough smooth solid standard strength surface surfaces texture textured textures uneven variation varied various wall wallpaper fence gloss glossy gray grey angles brown building contrast contrasting corrosion corrugated corrugations dark decay deterioration elements metal old perspectives rust rusty variations wearing weathering roof roofing peeling angle perspective bark cut edge edges furry light lines palm palm-tree parts pieces pith pithy shaped shapes tree trunk variety wood