What is the difference between a circle and a sphere? How can a drawing make a circle look like a ball?
A circle is a flat shape. A sphere is a three-dimensional form. A flat drawing can suggest a sphere by using changes in light and dark.
- Compare dimensions.
A circle has height and width on a flat surface. A real sphere also has depth.
- Observe light and dark.
Imagine a ball with light on one side. Some areas look lighter and others darker. In a drawing these changes can suggest volume.
- Keep the distinction.
Shading does not give the paper actual depth. It creates an illusion of three-dimensional form.
Is a shaded circle a real sphere? No: the drawing remains flat, even when it suggests a solid form.