Dutch artist Berndnaut Smilde creates his indoor clouds using a smoke machine and then photographs them—call it climate-manipulation.
"I'm interested in the ephemeral aspect of the work," Smilde told the Washington Post. "It's there for a brief moment and then the cloud falls apart. It's about the potential of the idea, but in the end it will never function."
"It has to be cold, damp and really wet, so I'm moisturising the air as much as possible," Smilde said in an interview with the BBC. "The moisture will stick to the smoke, making it heavier." Smilde adjusts the humidity of the room by spraying water, and reduces the temperature - this allows the smoke to take a cloud-like shape for just long enough so he can take a crisp shot of a cloud before it dissipates.
He shoots in art galleries, and mental hospitals, and in ballrooms--places who's history lingers much like his clouds of smoke.
A bit performance art, and a bit magic.