\documentclass[a4paper]{article} \usepackage{pst-torusmagic} \usepackage{pst-eucl} \usepackage[garamond]{mathdesign} \renewcommand{\ttdefault}{lmtt} \pagestyle{empty} \begin{document} \psset{unit=0.8} \psset[pst-solides3d]{viewpoint=40 30 30,SphericalCoor,Decran=30} \psset{% incolor=yellow!50,fillcolor=green!25, linecolor={[cmyk]{1,0,1,0.5}}} \begin{pspicture}(-8,-9)(7,5) \psframe*[linecolor=gray](-8,-9)(7,5) \psSolid[object=grille,base=-6 6 -6 6,linecolor=red, linewidth=0.5\pslinewidth,ngrid=12](0,0,-6) %\psSolid[object=grille,base=-6 6 -6 3,RotX=-90,linecolor=red, % linewidth=0.5\pslinewidth](0,-6,-3) %\psSolid[object=grille,base=-6 3 -6 6,RotY=90,linecolor=red, % linewidth=0.5\pslinewidth](-6,0,-3) \psTorusMagic[R=3,r=1.5,angularAperture=10, torusMagic,projectionXY,projectionXZ,projectionYZ]% \psTorusMagic[R=3,r=1.5,angularAperture=10,linecolor=red]% \gridIIID[Zmin=-6,Zmax=3,QZ=-1.5,linecolor=black](-6,6)(-6,6) \end{pspicture} \end{document}