 Giambattista della Porta added a "lenticular crystal" or biconvex lens to the camera obscura description in the 1589 second edition of "Magia Naturalis".He also described use of the camera obscura to project hunting scenes, banquets, battles, plays, or anything desired on white sheets.Trees, forests, rivers, mountains "that are really so, or made by Art, of Wood, or some other matter" could be arranged on a plain in the sunshine on the other side of the camera obscura wall.