One kind of illusion is art is to show at first sight something quite different from what a second sight would suggest. This no doubt requires great skill, besides a gifted talent in art, in that side of art. In this particular side of art one can see many forms in one form. By looking from different sides, and sometimes from each side, quite a different picture is seen, each proving the skill of the artist. In this form of art no doubt skill is more pronounced than beauty.