abstract appearance backgrounds bark brown bumps close-up colors colours cracks edge edges layers patterns ridges rough shades of colour smooth strips surface surfaces texture textured textures tree tree trunk trunk uneven variations wallpaper wood art-glass artistic artistry background blended blue bright color coloration colored colorful colour coloured colourful contrast craftsmanship decoration decoration-glass decorative distinctive glass glassy light lighting modern opaque orange panel patterned perspectives shaped shapes stained-glass style surfacing thick thin vibrant window architectural architecture brick-walls bricks brickwork formation heritage historic historic-site kiln kilns lime-kilns park patched patchwork repairs rock rock-work rocks rubble ruins shadows stairs steps stone stone-wall stone-work stones structure sunlight surfaced trees varied vegetation wall walls wooden-steps backdrop covered covering polished Sizes smoothed strength tiled tiles angles brick build building building-blocks firm loose selected selection singles solid variety 3-D alert appropriate-behavior appropriate-behaviour area attention banned cigarettes communicating communication danger direction directive environment eye-catching health health-risk location no-smoking not-allowed not-permitted permission-denied plastic pollution prohibited prohibition raised sign symbol tactile unhealthy warning wording words bronze dark design details interconnected interlinked interwoven liquid liquidy molten shape