Wall material transparency not honored in FireFox 50

Hello,

A wall with a semi-transparent material does not seem to be displaying correctly in FireFox 50, on both Mac & PC.

Rather than displaying a semi-transparent gray wall, the code below results in a fully opaque white wall. The wall has the expected appearance in the current versions of both Chrome and IE Edge.

Have I done something incorrectly?

Thanks!

Seth

var viewer = new Cesium.Viewer('cesiumContainer');
var entities = viewer.entities;

var cartesianPositions = Cesium.Cartesian3.fromDegreesArrayHeights( [-71.4178416666667, 43.5730416666667, 5000, -72.3041944444444, 43.6261111111111, 5000] );

entities.add( {
    wall: {
        positions: cartesianPositions,
        material: new Cesium.Color(0.5, 0.5, 0.5, 0.5),
        eyeOffset: new Cesium.Cartesian3( 100000 ),
    }
});

viewer.zoomTo(viewer.entities);

Hi Seth,

Thanks for reporting this! It looks like a bug. I’ve written up an issue on our GitHub here: https://github.com/AnalyticalGraphicsInc/cesium/issues/4687

Best,

Hannah

Hi Seth,

Sean fixed this in #4762. It will be in Cesium 1.29 on January 2.

Patrick