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% arara: indent: {overwrite: on, silent: yes}
\documentclass{article}
\usepackage{pst-solides3d}
\begin{document}

\begin{pspicture}(-3,-4)(3,6)
	\psset{viewpoint=20 40 40 rtp2xyz,Decran=30,lightsrc=20 10 10}
	\defFunction[algebraic]{torus}(u,v)
	{(2+cos(u))*cos(v+\Pi)}
	{(2+cos(u))*sin(v+\Pi)}
	{sin(u)}
	\psSolid[object=surfaceparametree,
		base=-10 10 0 6.28,fillcolor=black!70,incolor=orange,
		function=torus,ngrid=60 0.4,
	opacity=0.25]
\end{pspicture}

\end{document}