<vrColorMap>
  <transparencies>
    <transparency gray="0" value="0"/>
    <transparency gray="255" value="1"/>
  </transparencies>
  <colors>
    <color gray="0" alpha="255" red="128" blue="128" green="128"/>
    <color gray="255" alpha="255" red="204" blue="51" green="77"/>
  </colors>
  <gradientOpacities>
    <gradientOpacity gray="0" value="0"/>
    <gradientOpacity gray="255" value="1"/>
  </gradientOpacities>
  <shading>
    <ambiant value="0.4"/>
    <diffuse value="0.6"/>
    <specular value="0.3"/>
  </shading>
</vrColorMap>
