Marcus Newey has figured out how to create a multi-light effect using illumination for a single flash. He has posted this creative and highly effective technique in a flicker discussion group in which he explains how to photograph multiple shoots of the same scene with a single flash and then use Photoshop to combine the pictures to create one composite photo.
On the left is the scene as it would appear normally. The photo on the right is a composite image where the photographer shot the scenes using his one flash and firing it five times.
The tutorial is aimed at the real estate photography crowd but I can see some REALLY creative applications for this technique. An example might be how to light a very large interior such as a church using just one flash.
