children.get(i).setModelBound(modelBound);
children.get(i).setModelBound(modelBound.clone(null));
    public void setModelBound(BoundingVolume modelBound) {        if(children != null) {            for(int i = 0, max = children.size(); i < max; i++) {                children.get(i).setModelBound(modelBound);            }        }    }