Q:

What option do I have to set to remove the mesh from the cylinder?

\documentclass[pstricks,border=12pt,12pt]{standalone}
\usepackage{pst-solides3d}
\begin{document}

\begin{pspicture}[viewpoint=5 30 45 rtp2xyz,Decran=5](-6,-6)(6,6)
    \psSolid[object=cylindrecreux,h=2,r=1,fillcolor=cyan,ngrid=30 30]
    \axesIIID(1,1,1)(3,3,3)
\end{pspicture}
\end{document}

What option do I have to set to remove the mesh from the cylinder such that the cylinder looks clean, smooth with gradient color?
Edit:
When I set linewidth=0 I got the following, but I am not sure that linewidth=0 is the recommended solution.

A:

\documentclass[pstricks,border=12pt,12pt]{standalone}
\usepackage{pst-solides3d}
\begin{document}

\begin{pspicture}[viewpoint=30 30 20 rtp2xyz,Decran=30,lightsrc=viewpoint](-6,-6)(6,6)
    \psSolid[object=cylindrecreux,h=2,r=1,fillcolor=cyan,ngrid=20 20,
             grid=false]
    \axesIIID(1,1,2)(3,3,3)
\end{pspicture}
\end{document}

