abstract appearance architectural architecture background basic brick-wall bricks color colored colors colour coloured colours exterior external fence rough smooth solid standard strength surface surfaces texture textured textures uneven variation varied various wall wallpaper bare bark cambodian close-up cracked dry edge edges lines mottled pitted shapes sunlight tree tree-trunk trunk variations wood backgrounds brown bumps cracks layers patterns ridges shades of colour strips tree trunk angles appearances brick wall building cement firm mortar perspectives traditional brick wall walls angled concrete curved curves curving footpath gray grey grooved grooves ground hard-surface hard-surfacing lined mottling outdoors outside path pavement paving streaked streaks surfaced