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DIRECT LIGHT
This system of light is where there is a light source shining into
a scene. This divides the form into two parts: the illuminated
side that faces the light and the shadow side that is hidden from
the light. The lightest part on the light side where a light source
is directly reflected is the highlight. The transition value between
the light side and the shadow area is the halftone. The shadow
area would be totally black if it was completely devoid of light,
but as the light bounces off surrounding illuminated areas,
reflected light helps define the dark side of the form.
highlight
core shadow
halftone
cast shadow
reflected light
LIGHT EFFECTS ON FORM
This photograph shows how a direct light
source illuminates a form. You can see that
the light source is to your left.
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