I was playing around with Flash Player 10 3D capabilities yesterday and thought it was worth posting how to set the Stage vanishing point (as it’s not that well documented). The vanishing point is set to the top left corner of the stage by default. The below code set’s it to the center of the stage:

root.transform.perspectiveProjection.projectionCenter = new Point(stage.stageWidth * .5, stage.stageHeight * .5);