I know the developers have ruled out that METAR affects cloud shape, but most of the time when I’m at an airport with METAR, the clouds look disorganized and lack a realistic shape. If I fly about 100 km away and over an airfield without METAR, the clouds are more realistic.
In these images, the first two are from near airports with METAR, and the other two are from an airfield about 100 km away.
