abstract appearance backdrop background barrier brown colored coloring colors coloured colouring colours contain containment contrast contrasting decorative divide dry edges fence fencing hard light separation straight strong surface surfaced surfaces surfacing tactile texture textured textures upright variations variety wood wood-grain wooden angles color colour display hammered hardened historic iron large metal nails old perspective perspectives railways rusty secure shadows sleeper solid strength sunlight used woodgrain bamboo bambusa Bambuseae cover dried screen screened screening touch limestone-blocks spikes aged angled asphalt basic bitumen broken cracked cracks damage damaged damaging danger dangerous debris deteriorated deterioration Dirt gray grey hard-surface leaves poorly-maintained risk risky road rough split streaked streaks street tarmac uneven wallpaper