appearance bright brilliant circle cloud clouds colorful colourful contrast contrasting dark dramatic dusk evening glory gold golden halo light lighting rays setting sun shining skies sky southern spreading sun sun-rays sunset abstract background blended blue colored colors coloured colours conditions fine formations shapes spread textures thin vaporish vapourish variations various-cloud-formations weather white wispy black & white greyscale streaks streaky various cloud-formations atmosphere atmospheric cloud-formations following line movement moving streak trail trailing