abstract appearance Australian background bare bark brown colors colours cracked cracks cream dry edge edges eucalypt eucalypts gnarled 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 angles artistic backdrop black blended bright brilliant circles circular color colored colour coloured corners decoration decorative design detailed detailed patterns geometric geometrical green image images interconnected intermeshed interwoven kaleidoscopic patterns light mandala multicoloured orange patterns perspectives pointed points radiating rays rounded rust sharp style vibrant white gold golden purple yellow red art arty blue intricate intricate patterns rings vibrancy pink shoes dark