alone apple tree bare branch cloud clouds cloudy countryside dark dead died dramatic empty environment landscape loneliness mystery nature outdoor outdoors pasture rain rural scenic sky solitude sunlight sunlit sunshine threatening thunderstorm tree twilight weather abstract appearance Australian background bark branches brown colors colours contours cream edges gnarled layers lines Melaleuca mottled paperbark paperbark tree shadows shapes shedding soft surface texture textured textures tree trunk trunk uneven variations wallpaper wood cracked cracks dry edge eucalypt eucalypts gray grey rough smooth tree-trunk white