He uses a smoke machine, combined with moisture and dramatic lighting to create an indoor cloud effect. Smilde, who lived in Amsterdam, said he wanted to make the image of a typical Dutch rain cloud, inside of a space. ‘I imagined walking into a classical museum hall with just empty walls,’ he said. 'There was nothing to see except for a rain cloud hanging around in the room. ‘I wanted to make a very clear image, an almost cliche and cartoon-like visualization of having bad luck. "Indeed there's nothing here and bullocks, it's starting to rain!"' But the few people who have seen the clouds in person would consider themselves very lucky. Each cloud only exists for a moment before dissipating. The photograph, Smilde says, is a ‘document’, the only proof of its existence if a viewer misses it.
The first exhibit featuring indoor clouds, called Nimbus, was created by Smilde in 2010.
LINK Berndnaut Smilde