By adding ThreeDEffect to the Effects collection to ColumnChart and resizing column size using following code; I get ThreeD Effect extended to original width of column charts; can we apply ThreeD Effect at run tiime?

 const int columnWidth = 25;

            Box box = e.Primitive as Box;

            if (box == null) return;

            if (box.DataPoint == null) return;

            int dWidth = box.rect.Width - columnWidth;

            if (dWidth <= 0) return;

            box.rect.Width = columnWidth;

            box.rect.X += dWidth / 2;

it is applied at runtime, but i suspect it is applied after your custom layer or FillSceneGraph event handler.  i think the only way to synchronize the two things would be to remove the ThreeDEffect and add code in your FillSceneGraph handler to draw the 2D/3D effect.

here is the code used to generate the ThreeDEffect Polygon:

Polygon threeD = new Polygon(new Point[] {

new Point(currentBox.rect.X,                             currentBox.rect.Y), 

new Point(currentBox.rect.X + 5,                         currentBox.rect.Y - 5), 

new Point(currentBox.rect.X + 5 + currentBox.rect.Width, currentBox.rect.Y - 5),

new Point(currentBox.rect.X + 5 + currentBox.rect.Width, currentBox.rect.Y - 5 + currentBox.rect.Height),

new Point(currentBox.rect.X + currentBox.rect.Width,     currentBox.rect.Y + currentBox.rect.Height), 

new Point(currentBox.rect.X + currentBox.rect.Width,     currentBox.rect.Y) 

});

all the polygons like "threeD" in the above code should be added to the end of the SceneGraph.  it looks like right now they are inserted next to each column.