Meinst du so etwas?
etwas? (mit `xelatex` oder `latex->dvips->ps2pdf` laufen lassen.)
\documentclass[margin=2mm,pstricks]{standalone}
\usepackage{pst-solides3d}
\begin{document}
\begin{pspicture}[solidmemory](-3,-3)(1,5)
\psset{viewpoint=20 150 40 rtp2xyz,Decran=15,lightsrc=-10 15 10,action=none}
\defFunction[algebraic]{funcA}(x,y)
{(tan(.05*pi)/(sqrt(2)-tan(.05*pi)))*x-(tan(.05*pi)/(sqrt(2)-tan(.05*pi)))*y}
{x}
{y}
\psSolid[object=surfaceparametree,linecolor={[cmyk]{1,0,1,0.5}},
base=-1 pi pi neg 5 pi mul 3 div,
fillcolor=yellow!50,incolor=green!30,
function=funcA,linewidth=0.1\pslinewidth,ngrid=30,name=A]%
\defFunction[algebraic]{funcB}(x,y)
{x}
{(tan(.05*pi)/(sqrt(2)-tan(.05*pi)))*x-(tan(.05*pi)/(sqrt(2)-tan(.05*pi)))*y}
{y}
\psSolid[object=surfaceparametree,linecolor={[cmyk]{1,0,1,0.5}},
base=-1 pi pi neg 5 pi mul 3 div,
fillcolor=cyan!50,incolor=magenta!30,
function=funcB,linewidth=0.1\pslinewidth,ngrid=30,name=B]%
\psSolid[object=fusion,base=A B,action=draw**]
\end{pspicture}
\end{document}
![alt text][1]
[1]: http://texwelt.de/wissen/upfiles/Bildschirmfoto_vom_2015-07-31_21:18:07.png
