Hello,
I found a bug of Labels in Cesium 1.30. When I swithed to 2D,the label shows another black label.
I added a property of background and set the alpha 0.0 in Label.html , that could help me solve it.
function addLabel() {
Sandcastle.declare(addLabel);
viewer.entities.add({
position : Cesium.Cartesian3.fromDegrees(-75.1641667, 39.9522222),
label : {
text : 'Philadelphia',
//Added
backgroundColor: new Cesium.Color(0.165, 0.165, 0.165, 0.0),
showBackground : true
}
});
}