相关链接：

http://mars3d.cn/editor-vue.html?key=ex_1_2_1&id=map/other/backgroundImg

实现代码：

export function show1() {
  map.setOptions({
    scene: {
      backgroundType: "image",
      backgroundImage: "url(//data.mars3d.cn/img/busines/background1.jpg)"
    }
  })
}

export function show2() {
  map.setOptions({
    scene: {
      backgroundType: "color",
      backgroundColor: "red"
    }
  })
}

export function show3() {
  map.setOptions({
    scene: {
      backgroundType: "skybox",
      skyBox: {
        sources: {
          negativeX: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_mx.jpg",
          negativeY: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_my.jpg",
          negativeZ: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_mz.jpg",
          positiveX: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_px.jpg",
          positiveY: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_py.jpg",
          positiveZ: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_pz.jpg"
        }
      }
    }
  })

}

效果：

原始写法：

export function show1() {
  // map.container.style.backgroundImage = "url(//data.mars3d.cn/img/busines/background1.jpg)"
  map.setOptions({
    scene: {
      backgroundImage: "url(//data.mars3d.cn/img/busines/background1.jpg)"
    }
  })
}

export function show2() {
  // map.container.style.backgroundImage = "url(//data.mars3d.cn/img/map/world/world.jpg)"
  map.setOptions({
    scene: {
      backgroundColor: 'red',
    }
  })
}

export function show3() {
  // map.container.style.backgroundImage = "url(//data.mars3d.cn/img/busines/background2.jpg)"
  map.scene.skyBox = new Cesium.SkyBox({
    sources: {
      negativeX: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_mx.jpg",
      negativeY: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_my.jpg",
      negativeZ: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_mz.jpg",
      positiveX: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_px.jpg",
      positiveY: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_py.jpg",
      positiveZ: "//data.mars3d.cn/img/skybox/3/tycho2t3_80_pz.jpg"
    }
  })
}