Several curtains of thin gauze, or common mosquito netting, made to
let down from rollers, one after another, between the audience and the
scene, will give a beautiful, misty appearance; and if a sufficient
number of curtains be unrolled, the tableau appears to vanish
entirely, allowing room for a change of scenery. Many scenes should
have one thickness of muslin before them, which serves to blend the
colors, and gives a finish to the picture. The gauze must be carefully
managed, as the disclosure of a ragged edge will dispel all the
illusion.