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Shading a Sphere

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Shading a Sphere

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  1. drawing - Depiction of shapes and forms on a surface chiefly by means of lines. Color and shading may be included. A major fine arttechnique in itself, drawing is the basis of all pictorial representation, and an early step in most art activities. Though an integral part of most painting, drawing is generally differentiated from painting by the dominance of line over mass.

  2. Contour drawing - Drawing in which contour lines are used to representsubject matter. A contour drawing has a three-dimensionalquality, indicating the thickness as well as height and width of the forms it describes. Making a contour drawing with a continuous line is a classic drawing exercise (sometimes modified as a "blind continuous-line contour"): with eyes fixed on the contours of the model or object, drawing the contour very slowly with a steady, continuous line, without lifting the drawing tool or looking at the paper.

  3. line - A mark with length and direction(-s). An element of art which refers to the continuous mark made on some surface by a moving point. Types of line include: vertical, horizontal, diagonal, straight or ruled, curved, bent, angular, thin, thick or wide, interrupted (dotted, dashed, broken, etc.), blurred or fuzzy, controlled, freehand, parallel, hatching, meandering, and spiraling. Often it defines a space, and may create an outline or contour, define a silhouette; create patterns, or movement, and the illusion of mass or volume. It may be two-dimensional (as with pencil on paper) three-dimensional (as with wire) or implied (the edge of a shape or form).

  4. value scale - A gray scale, a series of spaces filled with the tints and shades of one color, starting with white or the lightest tint on one end, and gradually changing into the darkest shade or black on the other.

  5. shape - An element of art, it is an enclosed space defined and determined by other art elements such as line, color, value, and texture. In painting and drawing, shapes may take on the appearance of solid three-dimensionalobject even though they are limited to two dimensions — length and width. This two-dimensional character of shape distinguishes it from form, which has depth as well as length and width.

  6. Shading a Sphere

  7. Shading with Light Source

  8. Design using Different Values

  9. texture - An element of art, texture is the surfacequality or "feel" of an object, its smoothness, roughness, softness, etc. Textures may be actual or simulated. Actual textures can be felt with the fingers, while simulated textures are suggested by an artist in the painting of different areas of a picture — often in representingdrapery, metals, rocks, hair, etc. Words describing textures include: flat, smooth (third row, right), shiny, glossy, glittery, velvety, feathery, soft, wet, gooey, furry, sandy, leathery (second row, right), crackled (upper left), prickly, abrasive, rough (first row, right), furry, bumpy, corrugated (second row, left), puffy (second row, third), rusty (third row, second), and slimey (third row, third).

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