 source tree for
additional details and examples of the intermediate files and debugging
<b>ppmshadow</b>.

<P>Shadows are by default black, as cast by opaque material in the
image occluding white light.  Use the <B>-t</B> option to simulate
translucent material, where the shadow takes on the color of the
object that casts it.  If the contrast between the image and
background is insufficient, the <B>-t</B> option may yield
unattractive results which resemble simple blurring of the original
image.

<P>Becaus