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Figure 1. A cone represented by
means of planar approximation.
Figure 2. An example of the use of
Newell, Newell, and Sancha's
shading technique, showing trans-
parency and highlight effects.
Figure 4. Gouraud shading, applied
to approximated cone of Fig. 1.
Figure 8. Improved shading, applied
to approximated cone of Fig. 1.
Figure 9. Improved shading, applied
to the example of Figure 2.
Figure 10(a). A sphere displayed with
the improved shading.
Figure 10(b). A photograph of a real
sphere.