abstract angles appearance architectural architecture backdrop background cascade cascading color colour decoration decorative drops feature feature-wall gray grey ornamental rectangles rectangular rocks shaped shapes solid spray stone stone wall stones stonework surface surfaces textures varied wall water water-feature water-spray waterfall wet brown building CBD city colors colours dark design elements exterior external features green height high modern ornamentation perspectives Somber sombre walls barrier basic brick-wall brickwork cement colored colorful coloured colourful construction contrast cutouts decorated decorations firm linear lines mortar perspective rough secure security strength strong style surfaced texture textured variation various walled wallpaper well-built blended blue-gray blue-grey bubbles bubbling bubbly coloration curved curves details distinctive flow flowing interconnected interlinked interwoven light liquid liquidy merging patterns rounded shape surfacing thick thin vibrant watery bark bumps close-up cracked cracks curled curling curls dry edge edges gnarled grooves layers mottled peeling ridges shade shadows strips sunlight tree tree-trunk trunk uneven variations wood wrinkled wrinkles wrinkly bare bush contours dead exposed grooved outdoors smooth soft Stump swirls tree-stump twisted twisting building-maintenance-unit danger dangerous elevated equipment gondola Harness harnessed heights motorised paint painters painting platform platform-lift riggers rigging risks risky safety safety-harness suspended suspended-access up-high white work workers workmen