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