ceiling colored colorful coloring colors coloured colourful colouring colours creative curved curving decorated decoration decorations decorative design designed detailed direction display distinctive eixt-tunnel exit floor flooring light lighting lights lit mirrored mirrors passengers pedestrians people shiny Singapore subterranean-tunnel thoroughfare transportation-route Underground walled walls way-out artglass artistic atmosphere bright brilliant circles circular color colored colorful colour coloured colourful curves decore domed glass green images interior multicoloured patterned patterns Segmented segments setting shaped shapes skylight stained stained-glass surface surfaces textures window windows above angles contrast dark Designs electric energy fixtures globe globes glowing hanging height high illuminating indoors inside lamp light-fittings light-fixtures lighting-arrangement ornamental pattern perspectives round rounded shape shine styles suspended varied appearances architectural architectural-elements architecture building contemporary contrasting curve displayed elements high-rise internal linear lines metal modern shadows size space spacious steel sunlight supports views walkways wall atmospheric-humidity cool cooling descending down down-pour downward drop droping environment high-tech indoor-gardens liquid long public-area reflections structure tall transparent unique ventilation visibility water waterfall wet