\documentclass{article}
\usepackage{pst-solides3d,pst-node,pst-plot,multido,url}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{colortbl}
\usepackage{array}
\usepackage[a4paper,bottom=2.5cm,top=2cm]{geometry}
%%\usepackage[frenchle]{babel}
\makeatletter

\title{\texttt{pst-solides3d} :\\
       Test}
\date{\today }
\begin{document}
\maketitle

\section {Test fontes}

\psset{viewpoint=50 20 25 rtp2xyz,Decran=35}
\begin{pspicture}(-2.2,-1.5)(2,2)
\psSolid[object=new,action=draw,sommets=
  -2 -2 0  -2 2 0  2 2 0  2 -2 0,num=all,show=all,
   PSfont=Courier,fontsize=20,
]
\psSolid[object=point,
   args=0 0 0,
   PSfont=Symbol,fontsize=20,
   action=none,
   text=a,
   pos=uc,
]
\psSolid[object=point,
   args=0 0 0,
   PSfont=Helvetica,fontsize=20,
   action=none,
   text=é,isolatin,
   pos=dc,
]
\psSolid[object=point,
   args=0 0 3,
   PSfont=Helvetica,fontsize=20,
   action=none,
   text=é,
   pos=cl,
]
\end{pspicture}

\end{document}