Impressionistic sculpture represents a further departure from the normal and in the direction of the pictorial. Here part of the block from which the statue has been hewn is left an integral member of the piece; and out of it the figure seems to grow, as it were. It performs in the whole a function corresponding to the background of a portrait--the representation of the environment. Thus, in Meunier's "The Miner," the block represents the mine; in Rodin's "Orpheus and Eurydice," it represents the mouth of Hades; in his "Mystery of the Spring," a basin. Through the possibility of thus representing the relation of man to his environment a notable extension in the scope of sculpture is obtained. When a background is introduced, the figure or figures, being members of a larger whole, require less detailed treatment, less clearness of outline. Their parts may even be left in large measure unfinished, the contours melting together with the block. A special point of regard, from which alone the figures are modeled, is obviously essential. Striking is the contrast of this type with the classic, where the utmost precision in modeling is necessary. Along with the diminished emphasis on clearness of form goes an increased effort at the portrayal of the inner, more spiritual life; sentiment and mystery find an unwonted place in the art. Rodin's "Psyche" is a good illustration. Yet, despite these differences, the classic demand for living surfaces, for rhythmical lines, for perspicuity and totality of silhouette, for singleness and unity of material, abides. However, when the block attains prominence, the unification of the different figures through contact is no longer of equal necessity. The background serves the purpose of bringing the figures together, of providing a material bond between them. This is especially true in the various kinds of relief, between which and sculpture in the round, impressionistic sculpture is a sort of compromise. In relief there may even be a representation of perspective, the figures seeming to lie behind each other, flatter and smaller to indicate distance. But we shall not enter into the technique of this, which obviously approaches that of painting.