NavigationInfo { type ["WALK","ANY"] }
  
  DEF camera Viewpoint { position 0 0 10 }  
  
  Background { 
    groundAngle  [1.57]
    skyAngle     [1.57]
    groundColor  [0 .3 0, .3 .4 .3]
    skyColor     [0 0 .3, .3 .3 .4]
  }