Rapidly changing light on cloudy days, with the sun shining but frequently disappearing behind clouds, can result in very high contrasts between bright and dark periods, and so it is best to avoid capturing in these conditions. If you must fly, make sure that you set exposure when the sun is out (i.e. not when it is behind clouds), then leave exposure unchanged, even if the sun disappears behind clouds.
How do I set exposure when the weather is changing rapidly?
