<sect2 id="sect-gui-rendopt2">
    
 
 <title>The render options box : scene tab</title>
  
     <figure id="fig-interface-rendopt2">
        <title>The scene tab.</title>
        <screenshot>
          <mediaobject>
            <imageobject>
              <imagedata fileref="figures/interface_rendopt2.png" format="PNG" />
            </imageobject>
            <textobject>
              <phrase></phrase>
            </textobject>
           </mediaobject>
        </screenshot>
      </figure>


<para>
Scene options are global options for a povray scene.


<para><guilabel>Ambient light</guilabel></para>
<para>
Ambient light is used to simulate light that comes from undefined light sources, because it was refracted / reflected
too much. It gives scene a more realistic touch.
</para>


<para><guilabel>Number of waves</guilabel></para>
<para> 
Optionnal parameter to modify wave and ripple patterns aspect. Changes the density of these patterns.
</para>

<para><guilabel>Irid Wave lenght</guilabel></para>
<para> 
Modify Iridescence aspect. Default values are closed to natural values but you may try other settings for funny effects.
</para>

<para><guilabel>Global noise generator</guilabel></para>
<para> 
There are three noise generators implemented.
<para>
  <itemizedlist>

  <listitem>
      <para>
	<guilabel>Povray 3.1</guilabel>
      </para>
      <para>
      the noise that was used in POV_Ray 3.1.  
      </para>
  </listitem>

  <listitem>
      <para>
	<guilabel>Range corrected</guilabel>
      </para>
      <para>
      range corrected version of the old noise, it does not show the plateaus seen with type 1. 
      </para>
  </listitem>

  <listitem>
      <para>
	<guilabel>Perlin Noise</guilabel>
      </para>
  </listitem>

  </itemizedlist>
</para>
</para>


</para>
</sect2>



  <!-- end of button bar docs -->
 
