abstract Australia background blue cloud clouds colored colors coloured colours conditions feathery fine formations light movement shapes skies sky southern spread spreading streaky sun textures thin vaporish vapourish variations various-cloud-formations warm weather white wispy atmosphere climate climatology darkness daytime meteorology patterns streaks various cloud formations appearance blended cloud-formations gray grey winter wintry backdrop bright colorful colourful contrast contrasting dark dramatic dusk evening lighting ocean rain rain-bearing setting sun shining sunset texture vibrancy vibrant wallpaper