abstract appearance background brown colored coloring colors coloured colouring colours contours contrast contrasts cracks fissures flaws layers levels light lines natural ribbons rock rock-face rockface rough rugged shade shades of color shades of colour stone strata stratum surface surfaces texture textured textures veins wallpaper awareness beware blue-sky camera-surveillance cameras cctv closed-circuit-tv clouds communicating communication community exterior external height high high-up information informing lighting lookout monitoring observation observe outside public safety security security-cameras suburb suburban surveillance surveillance-cameras under-observation video-cameras watch watched cracked sunlight breaking through quartz