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    "JSON schema":"http://www.web3d.org/specifications/x3d-3.3-JSONSchema.json",
    "head": {
        "meta": [
          {
            "@name":"title",
            "@content":"Figure22.1BackgroundSkySphere.x3d"
          },
          {
            "@name":"creator",
            "@content":"Figure 22.1, The VRML 2.0 Sourcebook, Copyright [1997] By Andrea L. Ames, David R. Nadeau, and John L. Moreland"
          },
          {
            "@name":"reference",
            "@content":"http://www.wiley.com/legacy/compbooks/vrml2sbk/ch22/22fig01.htm"
          },
          {
            "@name":"translator",
            "@content":"Don Brutzman"
          },
          {
            "@name":"created",
            "@content":"22 August 2000"
          },
          {
            "@name":"modified",
            "@content":"15 January 2011"
          },
          {
            "@name":"description",
            "@content":"A sky sphere with multiple colors."
          },
          {
            "@name":"identifier",
            "@content":"http://www.web3d.org/x3d/content/examples/Vrml2Sourcebook/Chapter22-Background/Figure22.1BackgroundSkySphere.x3d"
          },
          {
            "@name":"generator",
            "@content":"X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit"
          },
          {
            "@name":"license",
            "@content":"../../license.html"
          },
          {
            "@name":"translated",
            "@content":"19 March 2017"
          },
          {
            "@name":"generator",
            "@content":"X3dToJson.xslt, http://www.web3d.org/x3d/stylesheets/X3dToJson.html"
          },
          {
            "@name":"warning",
            "@content":"An experimental version of X3D JSON encoding is used for this scene.  Status online at http://www.web3d.org/wiki/index.php/X3D_JSON_Encoding"
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    },
    "Scene": {
        "-children":[
          { "Background":
            {
              "@groundColor":[0,0,0],
              "@skyAngle":[1.309,1.571],
              "@skyColor":[0,0.2,0.7,0,0.5,1,1,1,1]
            }
          },
          {
            "#comment":"Note that navigation mode doesn't matter much here, since you cannot approach the backround, it always stays at maximum (horizon) distance"
          },
          {
            "#comment":"At least EXAMINE mode lets you easily look up/down/around."
          }
        ]
    }
  }
}