abstract background block brown colored coloring colors coloured colouring colours contours contrast cracks edged edges edging fissures flaws heavy large layered layers levels light lines natural red rock rock-face rockface rough rugged shadow shape shapes solid split stone strata stratum strength sunlight surface surfaces texture textured textures variations wallpaper aged angles board cracked cracking damage damaged decay deteriorating Dirt disused dry-wood grained grains gray grey lined lumber maintenance old plank planks rustic saw-burn-marks saw-burning splitting surfacing timber upkeep weathered wood wood-grains wooden worn arid backdrop bare barren bleak broken clay climate closeup concept dark dead desert desolate destruction dirty disaster drought dry earth environment environmental erosion extreme geology global ground heat hot land moody Mud nature outdoor pattern Soil terrain warming weather appearance blocks conglomerate contrasts rocky shade shadows silicate veins Australia bush clearing dried-leaves geological grass greenery shaped shrubbery vegetation color coloration colour green grunge grungy hue hues scratches tones variation vintage adhering architectural barrier brick-wall bricks brickwork constructed curved drill-holes exterior external linear modern mortar mottled perspective perspectives rectangular secure security smooth standard strong style varied various wall well-built