abstract Australia background blue-sky cloud clouds colored colors coloured colours conditions feathery fine formations light movement patterns shapes skies sky southern spread spreading streaky sun textures thin vaporish vapourish variations various-cloud-formations warm weather white wispy blue gray grey heavy-cloud-formationios late-afternoon layers levels multi-level skyshow thick various weather-indicators wind-blown appearance fluffy perspectives puffs contrast dark darkening darkness disturbing dramatic heavy lighting moody Morning shining sunrise various cloud formations