The Elusive Ellipse
By far, the most common problem artists encounter in drawing is with
unconvincing ellipses. The most common mistakes are to make them football-shaped, frankfurter-shaped or flat on one side, like a loaf of bread.
An ellipse is no more than the visual description of a circle viewed from different angles. Hold a dinner plate straight up and it's circular. But lay it down, it becomes elliptical until, viewed from the edge, it becomes a straight line....