<?xml version="1.0" ?>
<sdf version="1.6">
  <world name="default">
    <scene>
      <ambient>1 1 1 1</ambient>
      <background>0 0 0 1</background>
      <grid>false</grid>
      <origin_visual>false</origin_visual>
    </scene>
 </world>
</sdf>
