\psset[pst-solides3d]{viewpoint=40 30 10,SphericalCoor,Decran=30}
\begin{pspicture}(-6,-3)(6,3)
\psframe*[linecolor=gray](-6,-3)(6,3)
\psTorusMagic[R=3,r=1.5,
    angularAperture=90,
    linecolor=white,linewidth=0.5\pslinewidth]%
\end{pspicture}