In this technique the object appears in a three-dimensional form, protruding from the background plane. Relief sculpture is usually created by using perspective technology and should be examined from the frontal point of view. Relief scuplture consists of several types: a bas-relief (the image protrudes slightly above the plane, not more than half of its volume), a high relief (the image extends essentially above the plane), a hollow relief or concave relief (the image is deepened into a plane) and a coel anaglyph (a contour carved onto a plane).
