\documentclass{article}
\usepackage{pst-solides3d}
\pagestyle{empty}
\begin{document}
\begin{pspicture}(-3,-3)(3,5)
 \psset{viewpoint=60 80 30 rtp2xyz,Decran=60,lightsrc=viewpoint,solidmemory}
 \psSolid[object=anneau,h=1.7,R=4.4,r=3.8,name=A1,action=none,hue=0 1](0,0, 0.77)
 \psSolid[object=anneau,h=0.6,R=5,r=4.4,  name=A2,action=none](0,0,0.46)
 \psSolid[object=fusion,base=A1 A2]
\end{pspicture}
\end{document}
