 rendering may be customized by mean of keywords added to
the second argument to the plot function call, as follows:<br>
<ul>
  <li><span style="color: rgb(204, 51, 204);">flat, interp, faceted</span>:
affects
the
type
of
shading
used
(see








    <span style="font-style: italic;">help
shading</span>).<br>
  </li>
  <li><span style="color: rgb(204, 51, 204);">transparent, light</span>:
adds
transparency
(see












    <span style="font-style: italic;">help alpha</span>),
and
add some light(see <sp