Graphics Programs Reference
In-Depth Information
Light Type from Distant Light to Spot-
light . You should see some difference
in the OpenGL shading of your sphere,
but not a whole lot.
Figure 20-7: Same fur ball, but now the shadows
are working!
we were using a distant light. In other
words, even though we had Self Shadowing
selected in the SasLite Pixel Filter options,
the fibers weren't really shadowing them-
selves because we were using a distant
light.)
So, to sum it up, if you want to use
SasLite, you'll need to do these things:
1. Choose SasLite from the Add Dis-
placement menu in the Object
Properties panel.
2. Choose SasLite from the Add Pixel
Filter menu in the Processing tab of
the Effects window.
3. Change the lights in the scene to Spot-
lights so that SasLite can shade the
fibers properly.
Remember these three simple steps and
the rest of the work is simply tinkering with
the options!
Figure 20-6: Change the Light Type to
Spotlight in the Light Properties panel.
8. Tap < F9 > now, however, and you'll
find that the sphere is considerably
darker. This is because the fibers are
now self-shadowing.
SasLite, like its older brother Sasquatch,
works best with spotlights. That's some-
thing that you will want to remember. (If
you need to prove it to yourself, turn off
Self Shadowing in the Pixel Filter options
(<Ctrl> + <F8>) and do another <F9>
render. You'll find that the fibers look
almost exactly the same as they did when
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