\documentclass[a4paper]{article} \usepackage{pst-solides3d} \begin{document} \pagestyle {empty} \begin{pspicture}(-4,-4.5)(4,4.5) \psset{viewpoint=50 30 40 rtp2xyz} \psset{solidmemory} \psset[pst-solides3d]{color1=red!60} \psset[pst-solides3d]{color2=red!20} \defFunction[algebraic]{f}(x,y) {cos(x)+sin(y)} {} {} \psSolid[object=surface, base=-6.28 6.28 -6.28 6.28, linewidth=.001, r=5, ngrid=.25 .25, function=f, name=A, tablez=-.5 .5, zcolor=(Red) (Yellow) ] \end{pspicture} \end{document}