Dutch artist Berndnaut Smilde has developed a way to create clouds indoors by carefully regulating the space’s humidity, temperature and light. This intersection of science and art was recently named one of TIMEmagazine’s “Best Inventions of the Year 2012.”

The fluffy white clouds are summoned up temporarily using a fog machine, creating a surreal experience in the middle of a room. Smilde has created his clouds inside different types of locations, ranging from corridors and hallways, to bedrooms and common spaces.