[away3d] AbstractRenderSession 3.3 question

[ben]

For those who used to have a look at the AbstractRenderSession class
v3.3.3, in the method:

 public function renderTriangleBitmapF10(bitmap:BitmapData,
vertices:Vector.<Number>, uvtData:Vector.<Number>, smooth:Boolean,
repeat:Boolean, layerGraphics:Graphics = null,scale:Boolean =
false):void
        {
                if (!layerGraphics && _layerDirty)
                        createLayer();


                fill.bitmapData = bitmap;
                fill.repeat = true;
                fill.smooth = smooth;

                path.vertices = vertices;
                path.uvtData = uvtData;

                        if (layerGraphics) {
                                layerGraphics.lineStyle();
                                layerGraphics.drawGraphicsData(drawing);
                        } else {
                                graphics.lineStyle();
                                graphics.drawGraphicsData(drawing);
                        }
        }

I should be able to change the drawing scale per face by addin:
as fill is a GraphicsBitmapFill object
fill.matrix = new Matrix();
fill.matrix.scale(.2,.2);

but nothing changes ??? any idea ?