abstract appearance background brown colored coloring colors coloured colouring colours conglomerate contours contrast contrasts cracks fissures flaws grit gritty layered layers levels light lines mica natural rock rock-face rockface rocky rough rugged shade shadows shape shapes silicate stone strata stratum sunlight sunny sunshine surfaces texture textured textures veins wallpaper abundance abundant backdrop bamboo bambusa Bambuseae blades clump clump-of-bamboo contrasting display edges flattened foliage grass green greenery growth leafy leaves mature-leaves perennial plants straight strong upright variations variety vegetation yellow-green