var holder:myPrefabClass = new myPrefabClass();

for (var i:uint=0;i<holder.meshes.length;++i)
        _scene.addChild(holder.meshes[i]);


means you can use the as3 as data holder, and add meshes when you like it.
containers are very cheap.

Fabrice
 
On Jul 22, 2010, at 4:28 PM, dsirijus wrote:

> Is it possible? Currently, I am only able to get ObjectContainer3D,
> and I've read that this kind of nesting impacts performance. All
> models I need to export are single meshes.

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