      vmin, vmax : float
            Bounds for the normalization.

        shade : bool, default: True
            Whether to shade the facecolors.  Shading is always disabled when
            *cmap* is specified.

        lightsource : `~matplotlib.colors.LightSource`
            The lightsource to use when *shade* is True.

        **kwargs
            Other keyword arguments are forwarded to `.Poly3DCollection`.
        rv