Ed, anti-aliasing removes the jagged
look from a
computer-generated image. Because computer graphics are composed
of
square-shaped pixels, they sometimes have a jagged, stair-step look, and
anti-aliasing smooths this out. Render one of the sample images in
POV
with anti-aliasing off, and then render it again with aa on, and you
will see
the difference.
-Doug
Eichenberg