[away3d] As3Exporter - how to change material?

[Ralph B]

Hi - I am probably missing something obvious, but I cannot seem to
change the material of an object created with AS3Exporter.

For example, I have Thing.as that was created with AS3Exporter.

If I use this code:
var wsMat:WhiteShadingBitmapMaterial = new WhiteShadingBitmapMaterial
(new BitmapData(1,1,false, 0x00FF00));
var myThing:Thing = new Thing();
(myThing.meshes[0] as Mesh).material = wsMat;
view.scene.addChild( myThing );

then myThing draws but the material is whatever is defined within
Thing.as (such as WhiteShadingBitmapMaterial).

I am using DirectionalLight3D.

Another problem (maybe related): if I use PhongBitMapMaterial within
Thing.as, it renders as all solid uniform color, not Phong shaded.

Any suggestions?

Thanks!