Shading pictorial drawings may lead to confusion when describing shapes of objects.

More Questions from Perspective Drawings

• Perspective drawings are classified according to their number of ground lines.
• Most CAD programs produce only wireframe, not solid perspective representations.
• The picture plane can be placed either behind the object or in front of the object.
• Parallel lines converge toward a single point on the horizon called the vanishing point.
• The vanishing point is the intersection of the ground plane with the picture plane.
• The horizon in the perspective view should be drawn at the same level above the ground line as the height of the station point.
• Only vertical lines behind the picture plane are foreshortened.
• All parallel lines that are not parallel to the picture plane vanish at a point.
• Perspective drawings are the least time-consuming types of pictorials to draw by hand.

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