[pstricks] opacity in pst-solides3d

[Jon Joseph]

The following code snippet fuses a parametrized surface with an inner cylinder. I would like the opacity of the outer surface to be around .3 (i.e. opacity=.3) and the inner cylinder to be totally opaque (opacity=1). Given my method in the code opacity only seems to have an effect if it is included in a \psset{} macro in which case both surfaces are transparent. Including opacity=k in the directives for an individual solid has no effect on the individual surfaces.  Does deactivatecolor take opacity into account? Or is something else going on? Thanks, Jon

\begin{pspicture}[showgrid=true](0,-2)(2,2)
	\psset{solidmemory}
	\psset{lightsrc=30 -30 30,viewpoint=30 -30 30,
		Decran=100,linewidth=0.5\pslinewidth, ngrid=18 18,fillcolor=white, opacity=.3}
	\defFunction{sinshell}(u,v)
		{u}{2 u mul 1 add Sin .25 mul 1.2 add v Cos mul}{2 u mul 1 add Sin .25 mul 1.2 add v Sin mul}
	\psSolid[object=surfaceparametree,
		base=0 4 0 2 pi mul,
		action=none,
		linecolor=green,
		function=sinshell,
		opacity=.5,  %% No effect
		name=cylindre1](0,0,0)	
	\psSolid[object=cylindrecreux,%
		action=none,
		h=4, r=.75,
		incolor=red,
		opacity=1, % no effect
		RotY=90,
		name=cylindre2](0,0,0)
	\psSolid[object=fusion,
		deactivatecolor,
		base=cylindre1 cylindre2, RotX=0]
	\composeSolid
\end{pspicture}