blue cloud clouds colored colors coloured colours conditions fine formations gray grey heavy-cloud-formationios late-afternoon layers levels light multi-level shapes skies sky skyshow southern streaky sun textures thick thin vaporish vapourish variations various various-cloud-formations weather weather-indicators white wind-blown wispy compacted contrast gap lighting movement opening path perspectives shining spreading sunlight texture textured track trail heavy various cloud formations appearance black & white greyscale streaks various cloud-formations abstract background blended spread