\documentclass[a4paper]{article} \usepackage{pst-solides3d} \pagestyle{empty} \begin{document} %@AUTEUR: Manuel Luque \psset{viewpoint=25 10 30,SphericalCoor,Decran=20} \begin{pspicture}(-3.5,-3)(3.5,3) \psframe*(-3.5,-3)(3.5,3) \psSolid[object=grille,base=-4 4 -4 4,hue=0.8 0.8 0.1 0.8 0.8 1](0,0,-3) \psSolid[r1=3,r0=0.5,object=tore,ngrid=4 6,RotY=90,hue=0 1 0.75 1]% \end{pspicture} \end{document}