coast coastline color colored colors colour coloured colours green greenery growing growth layers levels ocean ocean-edge ocean-waterline plants rocks rocky rough scrub sea seashore seaside shade shadows shapes shore shoreline shrubbery shrubs Sizes stones stony sunlight sunshine tidal tide tides trees variety water abstract angles appearance background beach cracks crannies heavy hollows limestone sand seaweed solid strength strong surface surfaces surfacing texture textured textures uneven variations Australian bare bark brown cracked cream dry edge edges eucalypt eucalypts gnarled gray grey grooves lines mottled peeling self-shedding shedding smooth tree tree trunk trunk wallpaper wood balls balls of grass dried grainy grass grasses pebbles tumbleweeds weeds