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Chapter 10 Developing Design Solutions
Changing the position of the horizon line
can cause the object to be seen as if the
observer is looking down on the object
(aerial view), directly at it (general view), or
up at it (ground view). The designer must
decide which of these views best suits the
object and the audience who will see the
sketch.
When developing the basic structure
for one-, two-, or three-point perspective
sketches, designers follow the same basic
steps. See Figure 10-17. These steps are the
following:
1. Establish the horizon line, vanishing
point(s), and front of the object.
Connect the front line(s) to the
vanishing point(s).
2. Establish the depth of the objects
along the lines extending to the
vanishing point(s).
3. Connect the depth lines to the
vanishing point(s). Darken in the
object.
Designers then add details to com-
plete the sketch. Perspective sketches are
often shaded to add to their communica-
tion value. Developing the perspective, or
“human eye,” view is more difficult than
developing the oblique or isometric views.
Perspectives are, however, the most realis-
tic of the three pictorial sketches.
Figure 10-16. Changing the location of
the horizon changes the appearance of a
perspective drawing.
General View
Ground View
Aerial View
Horizon
Horizon
Horizon
Figure 10-17. Designers follow three basic
steps in developing perspective sketches.
Step 2
Step 1
Step 3
Vanishing points
Horizon