[away3d] LinearExtrusion closed ends?

[Ralph B]

Is there a way to close the ends on a LinearExtrusion?

For example, if I want to make a triangular prism:

var profile:Array = new Array();
profile[0] = new Vector3D(0,0,0);
profile[1] = new Vector3D(0,100,0);
profile[2] = new Vector3D(0,0,100);
var prism:LinearExtrusion = new LinearExtrusion(profile, {axis:"x",
offset:200, closepath:true, thickness:0});

The sides along the extrusion are correctly rendered, but the
triangular ends are open.

Thanks!
Ralph