Chapter 3 Value and Spherical Shapes Objectives Understand

Chapter 3 Value and Spherical Shapes

Objectives • Understand value and express a range of values as a value scale of grays. • Determine the value of the local colors of the objects in a still life on a value scale. • See the spherical shapes, including partial or modified spheres, in everyday objects. • Draw a reasonably accurate circle freehand. • Draw a spherical shape with the illusion of three-dimensional volume by accurately depicting light and dark areas.

Value • Value – An index of light • Value scale – A range of grays from white to black, usually expressed as 1 -10 • Tone – An individual gray in the scale

Seeing Values • Squint to see values accurately. • Establish a value scale by noting the lightest area and darkest area; then establish the midpoint.

Rendering Local Color • Block in tones for the local color of objects with a darker value, leaving the highlight white. • Leave lighter objects the white of the paper; block in only the shadows.

Spherical Shapes • Many objects have a sphere as their underlying shape. • Begin by drawing a circle.

Volume in Spherical Shapes (1 of 2) • The center of the sphere is closest to the viewer’s eye and must have the greatest contrast in value. • Drawing an outline around the whole sphere will attract the eye to the edges.

Volume in Spherical Shapes (2 of 2) • There’s reflected light in the shadow areas and cast shadow. • Think of the sphere as a clock face to position the cast shadow.

Summary (1 of 2) • Value – Index of light • Value scale – Organized way of calibrating grays from white to black • Each local color has a value expressed in a particular gray tone. • Squint to see values.

Summary (2 of 2) • Constantly compare values within the drawing and with the subject. • The sphere is one of the four basic shapes. • The center of a sphere is closest to the viewer’s eye, so it must have the greatest contrast in value.