abstract appearance Australian background bare bark brown colors colours cracked cracks dry edge edges eucalypt eucalypts gray grey grooves layers lines mottled peeling rough self-shedding shadows shapes shedding smooth sunlight surface texture textured textures tree tree trunk trunk uneven variations wallpaper wood bush bush plant cap caps capsule clusters colorful colourful conical green honky nuts leaves native natural natural coloring natural colouring plant seed pods strange trees unusual unusual shape Alice Springs Australia central Australia decoration decorative desert-country desert-region display garden gravel hot inland outback park ridge rocks rocky rugged scrub shrubbery sunshine terrain