<marathon>
  <!-- Make Marathon2/oo liquids semitransparent -->
  <software>
    <!-- Water -->
    <texture coll="17" bitmap="19" opac_type="3" opac_scale="0.5" opac_shift="0.5"/>
    <!-- Lava -->
    <texture coll="18" bitmap="12" opac_type="3" opac_scale="0.5" opac_shift="0.5"/>
    <!-- Sewage -->
    <texture coll="19" bitmap="13" opac_type="3" opac_scale="0.5" opac_shift="0.5"/>
    <!-- Jjaro -->
    <texture coll="20" bitmap="13" opac_type="3" opac_scale="0.5" opac_shift="0.5"/>
    <!-- Pfhor -->
    <texture coll="21" bitmap="5" opac_type="3" opac_scale="0.5" opac_shift="0.5"/>
  </software>
</marathon>
