angles appearances architectural architectural elements architecture black box-like buildings business district city city scapes city views colors colours contemporary contrast contrasting distance distant elements exterior external glass heights high high-rise interior light lighting linear lines modern office buildings perspectives reflections reflective skyscrapers steel tinted views walls wealth windows high rise abstract aqua art background blue chaos color colour communication concept dark debate design education fill gradient graphic green hanging illustration letters original pink purple rainbow reading texture thinking unique vector words writing yellow art-glass blank clear coloration colored coloured decorative distinctive door fixture panels panes patterned patterning patterns raised rectangles rectangular shaped shapes squares stained-glass style surface surfaced surfaces surfacing tactile textured textures variations variety vibrant wallpaper window appearance art glass artistic artistry cave christian christianity colorful colourful designed Designs faith frame framed Hong Kong looking-out prayer squared stained glass symbolic symbols barred barrier bars closed confine confined contained darkened decorated fence gate grille historic iron locked old sealed secure secured security shade shadow solid strength strong sunlight wrought-iron craftsmanship frames geometrical lead liquid-glass rippled shades-of-colour anas-superciliosa aquatic-bird artwork Australian bird black-eye-stripe brown-duck canvas common dark-brown duck fauna female fowl grey-duck image male nature omnivore omnivorous Pacific-black-duck paint painting pair render Rendered rendering waterbird waterfowl widespread wild-duck