I love you so much for this.

I’ve has a week trying to solve this in a proyect.

Great post! I thought I’d share this little utility I made using your code that I’m using a ton!

package com.jeffyamada.util
{
import org.papervision3d.core.math.Matrix3D;
import org.papervision3d.objects.DisplayObject3D;

public class PapervisionUtils
{
static public function swapParents( child:DisplayObject3D, fromParent:DisplayObject3D, toParent:DisplayObject3D ):void
{
var childWorldMatrix:Matrix3D = child.world;

var inverse:Matrix3D = new Matrix3D();
var tempParentMatrix:Matrix3D = new Matrix3D();

inverse.calculateInverse( toParent.world );
tempParentMatrix.calculateMultiply( inverse, childWorldMatrix );

child.copyTransform( tempParentMatrix );
child.parent.removeChild( child );

toParent.addChild( child );
}
}
}