[away3d] Prebaking

[Jose]

Hi, i'm testing the posibilities of Prebaking but I can't work with
shadows.
I have two Spheres with BitmapMaterial.

sph1 = new Sphere ();
sph1 .radius = _SPEHERERADIUS_;
sph1 .z = -900;
sph1 .bothsides = true;
container.addChild(sph1);

sph2 = new Sphere ();
sph2 .radius = _SPEHERERADIUS_;
sph2 .x = -200;
sph2 .bothsides = true;
container.addChild(sph2);

[..]

_bitmapMaterial = new
BitmapMaterial(Cast.bitmap(e.target.content.bitmapData));
sph1.material = sph2.material = _bitmapMaterial;


I have a PointLight3D too:

light = new PointLight3D ();

light.color = 0x989898;
light.brightness = 0.6;
light.specular = 0.6;
light.ambient = 0.6;
light.radius = 3000;
light.fallOff = 2000;

light.z = -1500;

scene.addLight(light);

And:

var LPB:LightPrebaker = new LightPrebaker(container, [ light ], 0.6,
true);
LPB.addOnTraceComplete(traceComplete);
LPB.apply();

If I use fast rendering everything works fine. When I use shadows, I
can only see the spheres with scena ambient.
What am I doing wrong?. Thanks.