[pstricks] intersection jaggies

[Jon Joseph]

I have three questions regarding the output from the code below:

1)  Notice the jaggedness at the intersection of the plane and the hyperboloid.  Is there any way to smooth this without requiring the ngrid parameter to be smaller than I have it?

2)  I know that when I do a fusion parameters like linecolor are lost but incolor and fillcolor are retained (the one I really want is opacity but it is tossed as well). Is it a technical impossibility to retain these settings?

3) The \composeSolid macro does not seem to be needed. Is this true in all cases?


\documentclass[12pt]{article}
\usepackage[letterpaper,asymmetric=true, total={18cm,22cm}, 
		top=3cm, bindingoffset=1cm]{geometry}
\usepackage[svgnames]{pstricks}
\usepackage{pst-plot,pst-infixplot}
\usepackage{pst-eucl}
\usepackage{pst-fun, pst-coil}
\usepackage{pst-solides3d}
\usepackage{pst-fun}
\usepackage{pstricks-add}


\begin{document}

\psset{unit=1cm} 
\psset{viewpoint=50 40 30 rtp2xyz,Decran=50} 
\psset{lightsrc=viewpoint}
\begin{pspicture}(-7,-8)(7,8)
	\psset{solidmemory}
	\defFunction[algebraic]{plane2}(u,v){0}{u}{v}

	\defFunction[algebraic]{hyperboloid}(u,v){(1+u^2)^0.5*cos(v)}{(1+u^2)^0.5 * sin(v)}{u}
	
	
	
	\psSolid[object=surfaceparametree, linecolor=blue!40, base=-3 3 0 6.28, fillcolor=cyan!50, incolor=green!50, function=hyperboloid, ngrid=.2 .2,  intersectiontype=1, intersectionplan={[-1 0 0 0]}, intersectioncolor=(rouge), intersectionlinewidth=2, action=none, name=hyper1]
	
	\psSolid[object=surfaceparametree, linecolor=blue!40, base=-3 3 -3 3, fillcolor=red!50, incolor=yellow!50,
	 function=plane2, 
	 ngrid=.25 .25,
	 action=none,
	 name=firstplane]

	\psSolid[object=fusion, base=hyper1 firstplane, intersectiontype=1, intersectionplan={[1 0 0 -.05 ]}, intersectioncolor=(bleu), intersectionlinewidth=4]
%	\composeSolid
	\axesIIID(0,0,0)(5,5,5)
\end{pspicture}


\end{document}