Pencil projects53CREATING FORM USING TONE
Medium: 3B
The tone used here relies on an observed
directional light source, which is then
exaggerated to create the effect. The shadow
cast makes us believe the sphere has form.
Without it the drawing would look flat.
Medium: 4B
This cube has been constructed using three
defined tonal variations - white, grey and black
- to give the illusion of form. It is a constructed
illusion, of course, and has not come about as
a result of observed tonal changes.
Medium: 5B
The lighting appears to be from the front in
this example of constructed tonal form. The
light cast at this angle is very intense, gradually
fading to complete darkness towards the sides
of the cone. Lighting was used by early
Renaissance artists such as Giotto.Medium: 6B
The cylinder is like the sphere in observation,
tone and how light plays across the surface of
the form. But the tone we have used to define
the form is an expressive gestural tone. It has
less form than the previous tonal gradation
and is more emotive and responsive to the
observation.