8
EXERCISE FIVE/THREE EFFECTS USING MASKS OR FRISKETS
Rendering these basic forms will provide instruc-
tion and sequence in shading these shapes, which
comprise all of the shapes you will encounter.
Combinations of these forms make up all of the
various products, etc. In airbrushing these
shapes, it is a general rule to have the light source
coming from the upper left hand corner at about a
45 degree angle.
CUBE
Make a line drawing lightly about twice the
size of the above illustration. Cut a frisket for the
outline and dividing lines of the separate sides. At
this time remove the frisket from the side farthest
from the light source. Gradually airbrush a tone
from the upper left corner to the lower right hand
corner. Repeat the gradual dark tone as neces-
sary, then remask the finished side and start the
other sides until the desired effect is achieved.
CYLINDER
Note how the light varies on the cylin-
der and makes the top flat surface different from
the curved area. The frisket is cut along the
curved line and while the top is masked, the side
is sprayed. Then the side is masked and the top is
sprayed.
Only practice will enable you to know how dark to
paint one side of the subject while the other is
masked.
CONE
Again cut a frisket of a cone shape. Remove
the cone shape from the frisket. Start airbrush
action from the top. Paint and flair slightly
towards the curved base. Repeat the action on the
right side until you achieve the tapered appear-
ance as illustrated above.
SPHERE
Place a frisket on the board making sure
the remaining portion of the board is not exposed
to airbrushing overspray. Use a compass knife
and cut your circle and remove. Gradually air-
brush lightly around the entire edge of the circle
in a curved, rocking, back and forth motion. Next,
start from the bottom right hand portion of the
circle and airbrush upwards towards the center
not quite reaching the center. Allow a high lighted
circular portion of the sphere near the upper left
hand portion. Continue until the sphere takes on a
three dimensional appearance.
