Gas sculpture is a proposal made by Joan Miró in his late writings to make sculpture out of gaseous materials.
Some sources[1] have alleged that lead can be used for gas sculpture.
True gas sculpture is to be differentiated from the supposed "gas sculpture" at the Universe Zone at the American Museum of Natural History, which is not truly a gas sculpture.
There is an example of gas sculpture in the sculpture garden at the Australian National Gallery in Canberra. A large bank of very small nozzles is arrayed on the edge of a small rush-filled pond, and when the power is switched on a fine mist of fog billows out. The 'sculpture' has a continuously changing shape as it is affected by the water, the rushes and the air-currents in the area.
Some kinetic sculptures contain gaseous elements, such as the fog nozzles of Jean-Paul Riopelle's La Joute, which also includes fire jets, a fountain, and bronze sculptural elements.