fgdata/Compositor/HDR/env-capture-pass.xml

<?xml version="1.0" encoding="utf-8"?>

<PropertyList>
  <type>scene</type>
  <effect-scheme>hdr-envmap</effect-scheme>
  <clear-mask>depth</clear-mask>
  <!-- Only render the skydome and terrain -->
  <!-- TODO: Explicitly select the LOD level -->
  <cull-mask>0x801</cull-mask>
  <binding>
    <unit>11</unit>
    <buffer>sky-view</buffer>
  </binding>
</PropertyList>