\documentclass{article} \usepackage[dvipsnames,svgnames]{pstricks} \usepackage{pst-solides3d,pstricks-add} \pagestyle{empty} \begin{document} \begin{center} \psset{unit=0.5} \psset{lightsrc=30 -10 10,linewidth=0.5\pslinewidth} \multido{\r=1+1}{75}{ \psset{SphericalCoor,viewpoint=30 50 \r\space,Decran=50} \begin{pspicture}(-5,-6)(5,10) \psSurface[ fillcolor=cyan!50,algebraic, ngrid=.25 .25,incolor=yellow,hue, Zmin=-3,Zmax=3](-3,-3)(3,3){% x*y*(x^2-y^2)*0.2} \end{pspicture} \newpage } \end{center} \end{document}