<vrColorMap>
  <transparencies>
    <transparency gray="0" value="0"/>
    <transparency gray="18" value="0"/>
    <transparency gray="20" value="1"/>
    <transparency gray="255" value="1"/>
  </transparencies>
  <colors>
    <color gray="0" alpha="255" red="255" blue="255" green="255"/>
    <color gray="20" alpha="255" red="255" blue="161" green="175"/>
    <color gray="200" alpha="255" red="255" blue="255" green="255"/>
    <color gray="255" alpha="255" red="255" blue="255" green="255"/>
  </colors>
  <gradientOpacities>
    <gradientOpacity gray="0" value="0"/>
    <gradientOpacity gray="20" value="1"/>
    <gradientOpacity gray="255" value="1"/>
  </gradientOpacities>
  <shading>
    <ambiant value="0.6"/>
    <diffuse value="0.6"/>
    <specular value="0.6"/>
  </shading>
</vrColorMap>
