# Package pgf Warning

I'm working with MikTex2.9 and I couldn't get rid of this warning message:

Package pgf Warning: Your graphic driver pgfsys-dvips.def does not support fadings. This warning is given only once on input line 31.

By trying this example:

\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\node [style=ball] {blah blah blah};
\end{tikzpicture}
\end{document}


I got a .pdf slightly different from the .dvi file (the shadow is a little lighter) and I was wondering if this problem could be linked with the warning or if it's only a problem of the reader (as reported in: Tikz: Strange color change. ).

Thanks in advance for any suggestions.

-
@Arianna: why don't you compile to PDF directly? With pdfTeX I don't get that warning. –  Stefan Kottwitz Dec 13 '10 at 18:33
By compiling to PDF I don't get the warning, but the shadow is always lighter (it should be black) –  Arianna Dec 13 '10 at 18:39
@Arianna: ok, "I got a .pdf slightly different from the .dvi file" just read to me like you created the .pdf from the .dvi (dvips/ps2pdf or dvipdfmx), that's why my pdfTeX suggestion. –  Stefan Kottwitz Dec 13 '10 at 18:58
from .dvi (with dvips/ps2pdf); from .tex to .pdf with LaTeX => PS => PDF(latex.exe) and with LaTeX => PDF(pdflatex.exe) –  Arianna Dec 13 '10 at 19:15
I have to try dvipdfmx. Thanks Stefan! –  Arianna Dec 13 '10 at 19:17

The default settings for the shadow are opacity=.5, fill=black!50, i.e. medium gray and half transparent.
To turn off the transparency use something like drop shadow={black,opacity=1}.