Perspective Practices, Continued
SHADOW: Shadows in perspective necessitate your determining the position
of a light source and a vanishing point for the shadow. Establish a light
source either on or off your drawing paper. This is a simulated position and
direction that indicates the location of a real light such as the sun or a light
bulb. Locate a vanishing point for the shadow vertically below the light
source on the horizon. Draw visual rays from the simulated light source to
the corners of the object. Extend the rays to the plane on which the object
rests. Draw lines from the vanishing point of the shadow to intersect the
visual rays from the light source along the ground line. The shadows will
follow the contour of the plane or object on which they fall.
Figure 5-27 shows the location of a light source, shadow vanishing point, and
shadows in perspective.
Figure 5-27.Shadows in perspective.
Continued on next page