\documentclass[a4paper]{article} \usepackage{pst-solides3d} \pagestyle{empty} \begin{document} %@AUTEUR: Juergen Gilg \begin{pspicture}(-6,-5)(6,6) \psset{lightsrc=10 10 10,viewpoint=20 20 20,SphericalCoor,Decran=100, ngrid=18 30,r0=0.25,r1=0.9,RotY=45,solidmemory=true,hollow, incolor=lightgray,unit=0.5} \psSolid[object=tore, RotY=90, fillcolor=lightgray, action=none, name=anneau1](0,-2.5,0) \psSolid[object=tore, RotY=90, fillcolor=lightgray, action=none, name=anneau2](0,0,0) \psSolid[object=tore, RotY=90, fillcolor=lightgray, action=none, name=anneau3](0,2.5,0) \psSolid[object=tore, fillcolor=lightgray, action=none, name=anneau4](0,-1.25,0) \psSolid[object=tore, fillcolor=lightgray, action=none, name=anneau5](0,1.25,0) \psSolid[object=fusion, base=anneau1 anneau2 anneau3 anneau4 anneau5, name=anneaux, opacity=0.6, action=draw**]% \composeSolid \end{pspicture} \end{document}