The clever use of color and contrast by an aviation photographer produced interesting results after he filmed aircraft landing in wet conditions. The wingtip vortices from planes are rendered in striking detail in the footage, shot over several weeks at Birmingham Airport in the UK.
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Wow, those pictures are amazing. Many aircraft are showing distinct swirls at the edge of the extended flaps. NASA is funding research on aeroelastic, flexible wings that are smooth also with flaps extended and control surfaces active. Although, over the course of a flight, flaps are extended for only a relatively short period of time, so the business case for such technology is perhaps a little bit hard to close. But very interesting for sure.