While Chris Drury often creates transient artworks using only natural found materials, he’s best known for his more permanent landscape art and installations. Some of these works include his cloud chambers, such as this one at the North Carolina Museum of Art, which is known as “Cloud Chamber for the Trees and Sky.” Each of Drury’s chambers has a hole in the roof, which serves as a pinhole camera. When viewers enter the chamber, they can observe images of the sky, clouds and trees projected onto the walls and floor.