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Art 141 Chapter 4 Shape Value Shading Shadow

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Information about Art 141 Chapter 4 Shape Value Shading Shadow
Education

Published on September 30, 2008

Author: kccartprofessor

Source: slideshare.net

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Chapter 4 Shape, Value, Shading, Shadow

Geometric Shapes 2D shapes on the left 3D shapes on the right Square Triangle Circle Box Pyramid Sphere

Shape / Form A shape is an area that is defined in some way by a line, an edge, a color or a texture. If we traced around its outline we would have a shape, silhouette Shapes are flat they have only two dimensions – height and width Shapes can be geometric – look as if they were made with a ruler. Organic – irregular, uneven shapes of nature.

A shape is an area that is defined in some way by a line, an edge, a color or a texture. If we traced around its outline we would have a shape, silhouette

Shapes are flat they have only two dimensions – height and width

Shapes can be geometric – look as if they were made with a ruler.

Organic – irregular, uneven shapes of nature.

Organic Shapes irregular, curving, rounded, relaxed, informal, lines in nature

irregular, curving, rounded, relaxed, informal, lines in nature

Positive/Negative Shapes Positive shapes – subject or dominant shapes on the picture plane Negative shapes – background areas

Positive shapes – subject or dominant shapes on the picture plane

Negative shapes – background areas

Value Value can be flat or graduated Can be created by using shading, line or dots. Lines can be used to create value in hatching or cross-hatching Dots can be used to create value. Value can be subdued Strong Contrasting

Value can be flat or graduated

Can be created by using shading, line or dots.

Lines can be used to create value in hatching or cross-hatching

Dots can be used to create value.

Value can be subdued

Strong

Contrasting

Value

Value Hatching and cross-hatching Rembrandt

Value Dramatic use of light creates value. Light is used to attract our attention to the most important part of the painting Chiaroscuro effect The relative lightness or darkness is the value. A black-and-white photo or movie involves not only black and white, but also different values of gray.

Value refers to the relative lightness or darkness of a certain area. Value can be used for emphasis. Variations in value are used to create a focal point for the design of a picture. A light figure on a dark background will be immediately recognized as the center of attention, similarly for a dark figure on a mostly white background. Gradations of value are also used to create the illusion of depth. Areas of light and dark can give a three-dimensional impression, such as when shading areas of a person's face. 

Value Scale The above graphic is called a Value Scale. Tonal graduations in color from light to dark produce perspective. Graduation of tone can add interest to a shape. A graduation from light to dark will cause the eye to move along the shape. Using black and white paint, many artists make a rectangular value scale with ten values. Pure white will be at one end, then mix varying amounts of black and white to create eight shades of gray, increasing in value, ending with pure black.

Cast shadows are the dark shapes that emanate from an object onto another surface, revealing the direction and quality of the light source.

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