FlatShadeMaterial with collada object ?

Hi there

How is it possible to assign FlatShadeMaterial to collada object ?

light = new PointLight3D(true); 
light.z = -800; 
light.y = 300;
flat = new FlatShadeMaterial(light, 0xFFFFFF, 0x444444);		
collada60=new Collada("60sided.dae");
scene.addChild(collada60);

because normally with primitive, you assign “flat” at this stage.

sphere = new Sphere(flat, 150, 8, 8);

Thanks

I fand the answer:

flat = new FlatShadeMaterial(light, 0xFFFFFF, 0x444444);
var ml60 : MaterialsList = new MaterialsList();
ml60.addMaterial(flat, "initialShadingGroup"); 
collada60=new Collada("60sided.dae",ml60);

Simple no ?

But now how can I change the texture or color of my collada object ?