<!DOCTYPE dt [
  <!ENTITY skybox_default SYSTEM "skybox_default.xml">
  <!ENTITY skybox1 SYSTEM "skybox1.xml">
]>
<skybox>
  <!-- Default definitions (see the linked file for more details) -->
  &skybox_default;

  <!-- Custom definitions for maps -->
  <map name="startmap.elm">
    <!--
      The elements defined here can use the attribute 'reset' to specify
      if the previous definitions are discarded or updated.

      Example:
      ^^^^^^^^
      If the default definitions for the sun are:
      <sun>
        <color t="150" r="1.0" g="0.9" b="0.5" />
        <color t="300" r="0.0" g="0.0" b="0.0" />
      </sun>

      Then if we define here the following:
      <sun>
        <color t="30"  r="1.0" g="0.7" b="0.3" />
        <color t="180" r="1.0" g="0.7" b="0.3" />
      </sun>

      The resulting color table for the sun will be:
      <sun>
        <color t="30"  r="1.0" g="0.7" b="0.3" />
        <color t="150" r="1.0" g="0.9" b="0.5" />
        <color t="180" r="1.0" g="0.7" b="0.3" />
        <color t="300" r="0.0" g="0.0" b="0.0" />
      </sun>

      Now, if we define the following:
      <sun reset="yes">
        <color t="30"  r="1.0" g="0.7" b="0.3" />
        <color t="180" r="1.0" g="0.7" b="0.3" />
      </sun>

      Then the resulting color table for the sun will be:
      <sun>
        <color t="30"  r="1.0" g="0.7" b="0.3" />
        <color t="180" r="1.0" g="0.7" b="0.3" />
      </sun>
    -->
    &skybox1;
  </map>
</skybox>
