\documentclass{article} \usepackage{pst-solides3d} \begin{document} \begin{center} \psset{unit=1} \psset{viewpoint=30 20 30,Decran=100} \begin{pspicture*}(-4,-4)(4,4) \psframe(-4,-4)(4,4) \psSolid[object=octahedron, a=2, trunc=all, hue=.5 .6, trunccoeff=.2, action=draw*] \end{pspicture*} \end{center} \end {document}