SHADE & SHADOWS
Multiview Drawings
The casting of shade and shadows is especially useful to
overcome the flatness of multi view drawings and enh
ance
the illusion of depth.lt generally requires two related
views-either aplan and elevationor two related
elevations-and the transferring of information back
and forth from one view to the other.
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• In multiview drawings, we assume the conventional
direction of sunlight to be parallel to the diagonal
of a cube from the upper left front corner to the
lower right rear corner.
TOr
• While the true altitude of this diagonal is 35° 16',
in plan and elevationviews, this direction is seen as
the 45° diagonal of asquare. This convention
produces shadows of widt hor depthequal to the
width or depth of the projections that cast t he
shadows.
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The process of determining the shape of a cast
shadow begins with drawing a 45° light ray through
a point along the casting edge in both views.
In the view showingthe edge view of the receiving
surface, the ray is extended until it intersects the
receiving surface.
f'!..AN VIEW
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We project this intersection to the related view.
The intersection of this transferred line withthe
ray in the adjacent view marks the shadow of the
point.
RENOERING TONAL VALUES /145