Introduction to three-dimensional forms
These forms of art have existed right from the Egyptian civilization. The walls of Egyptian temples were decorated with this technique. Bas- relief is a technique, which can be actually termed as two-dimensional work. But at some places the sculptors carve out the portions and give it a three-dimensional effect. While doing this exercise our brain has to calibrate itself to imagine a three-dimensional form with the help of two-dimensional sketches. The sketches done by an artist on the surface before carving is a two-dimensional line work. A circle drawn on the surface can represent a cylinder, a concave sphere or may be a convex vault. This training to the brain is necessary for visual artists to improve their imagination abilities.