58 Problems with Drawing in Line
One of the problems in using line alone to draw with is that there are very few lines in nature. Even the outline of an object is not truly a line, because if the object were turned one-quarter on its axis toward us, what was the edge would now be the center.
If we think of that circle as a head and put a round nose on the profile, when it is turned toward us it will still be a round nose.
But if we have a real human head with a real human nose on it, the complex shape of the nose changes drastically as we look ...