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 abstract appearance Australian background bare bark brown coppery eucalypt mottled smooth sunlight surface texture textured tree tree-trunk trunk upright wallpaper wood blue cloud clouds colored coloured conditions fine formations skies sky southern sun thin vaporish vapourish various cloud formations weather wispy architecture brick brick texture brick wall bricks building colour construction old painted stripes structure structures vertical wall white