[away3d] BSP faces material change

[John Brookes]

Just checking Im not missing something but is there a default way of getting
the faces of the BSP _tree?

Had to add
public function get facesBSP():Vector.<Face> { return _faces; }
to BSPTree.as

so I can do something like
var vm:VideoMaterial = new VideoMaterial();
vm.file = "water.flv";
vm.loop = true;

BSPTree(_tree).facesBSP[56].material = vm;
BSPTree(_tree).facesBSP[57].material = vm;