\documentclass{article} \usepackage{pst-solides3d} \begin{document} \pagestyle{empty} \definecolor{Brown}{cmyk}{0,0.81,1,0.60} \begin{pspicture}(-6,-5)(6,6) \psset{lightsrc=50 -50 50,viewpoint=40 0 20,SphericalCoor,Decran=100,ngrid=18 30,r0=0.25,r1=0.9} \psSolid[object=tore,solidmemory=true, RotY=90, fillcolor=blue, action=none, name=anneau1](0,-2.5,0) \psSolid[object=tore,solidmemory=true, RotY=90, fillcolor=Brown, action=none, name=anneau2](0,0,0) \psSolid[object=tore,solidmemory=true, RotY=90, fillcolor=red, action=none, name=anneau3](0,2.5,0) \psSolid[object=tore,solidmemory=true, fillcolor=yellow, action=none, name=anneau4](0,-1.25,0) \psSolid[object=tore,solidmemory=true, fillcolor=green, action=none, name=anneau5](0,1.25,0) \psSolid[object=fusion, base=anneau1 anneau2 anneau3 anneau4 anneau5, name=anneaux, action=draw**]% \composeSolid \end{pspicture} \end{document}