【解决办法】
1.可以设置disableDepthTestDistance值来解决
viewer.entities.add({
id: "test",
position: Cesium.Cartesian3.fromDegrees(longitude, latitude,height),
billboard: {
image: './images/xxxxxx.jpg',
disableDepthTestDistance:Number.POSITIVE_INFINITY//返回正无穷大
}
});
2.设置viewer.scene.globe.depthTestAgainstTerrain=false取消深度测试
