A few notes about this. The photograph is a 6 second exposure, with 3 stacked ND filters. The camera was waved around a bit after around 3 seconds had elapsed. Other than a RAW conversion and, I think some curves, nothing else has been down to the shot. The colour flowy effects were produced in camera. It is not two exposures, it is not two shots combined. It was the result of an accident with an earlier shot and me thinking this could work nicely.