I've seen photos of building interiors and exteriors in which multiple flash or light painting was used to get excellent results. In the case of the exteriors, the shots were made at dusk, and the light gave tonal variation to large blank surfaces. The light was hidden behind bushes near the building and resembled permanent landscape illumination. The photographer claimed that the building's owner like the effect enough to replicate it with actual landscape lighting. It's an intriguing technique that allows you to simulate complex lighting setups with only one instrument.