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How can a line make an object appear three-dimensional in a drawing?
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Drawing
The Artist's Sister, Edma, with Her Daughter, Jeanne, watercolor over graphite on paper by Berthe Morisot, 1872; in the collection of the National Gallery of Art, Washington, D.C.
In drawing, lines create the illusion of three-dimensional volume on a two-dimensional plane through several techniques that manipulate how the viewer perceives form, depth, and light.12
- Structural Lines: The arrangement of lines can suggest cubic bodies or spatial depth. For instance, convergent lines are used in linear perspective to simulate objects receding into the distance, while the angular meeting of lines can define the borders of planes.12
- Modeling and Shading: Hatching and cross-hatching use parallel or intersecting lines to indicate light, shadow, and surface modeling. Gently curved hatching specifically stresses the roundness of a body, while cross-hatching reinforces the effect of volume and shadow.13
- Line Quality: Variations in line thickness or "stroke strength" can indicate changes in an object's surface or spatial position. Slight shifts in the flow of a line can represent smooth curves and transitions, reinforcing the effect of light striking a surface to give a corporeal appearance.1
- Contour Drawing: By focusing on the contour, artists emphasize tactile values, mass, and volume rather than just a flat outline.4