Gist for testing Ceisum Label/Billboard camera issues

culling.js

var viewer = new Cesium.Viewer('cesiumContainer', {
    timeline : false,
    animation : false
});
viewer.scene.minimumDisableDepthTestDistance = Number.POSITIVE_INFINITY;

var dataSource = Cesium.GeoJsonDataSource.load('../../SampleData/simplestyles.geojson');
viewer.dataSources.add(dataSource);

viewer.camera.setView({
    destination: new Cesium.Cartesian3(6386504.750228504, 75813.920583786, -58726.819241853744),
    orientation: {
        direction: new Cesium.Cartesian3(-0.11989477682735832, 0.8011606882897737, 0.5863162917986964),
        up: new Cesium.Cartesian3(0.9926818389396638, 0.10532217621496866, 0.05907627135077764)
    }
});