cesium 改背景图

var viewer = new Cesium.Viewer('cesiumContainer', {

orderIndependentTranslucency: false,

contextOptions: { webgl: { alpha: true, } },

});

viewer.scene.skyBox.show = false;

viewer.scene.backgroundColor = new Cesium.Color(0.0, 0.0, 0.0, 0.0);

//viewer.scene.skyAtmosphere.show = false;

//viewer.scene.skyAtmosphere.brightnessShift = -0.0;