backdrop backgrounds bursts colors colours dark distant distortions images large light lines merged mosaic patterned patterns perspectives radiating repeated shapes small symmetric symmetry textures tiled variations cut glass pretty stained etched rectangles window detail rectangle pattern angles appearances architectural architectural elements architecture building chinese colorful coloring colourful colouring decorated decorations decorative distinctive elements exterior exterior shutters external functional louver blades louvered louvers louvre blades louvred louvres old ornamental ornamentation painted plantation shutters protection shade shelter sheltered shuttered shutters traditional window covering window frame window shutters windows