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 blue color concept creation curly design fill Fractal frightening ghost glow graphic halloween image light low resolution magical motion New original pattern render scary shape smoke spooky style swirl transparent unique vector wave weird white will-o-the-wisp abstraction art backdrop black branch card celebration decoration decorative detail digital form futuristic geometric geometry illustration life modern season space structure trendy xmas blur bright bubble celebrate christmas circle copyspace festive fun green holiday illusion merry paint pink pretty purple rainbow red round winter yellow