Victor Ivrii - 2014-03-23

If I create a picture like this

\begin{tikzpicture}
\fill[red] (0,0) circle (1);
\end{tikzpicture}
then pdf has a transparent background. However with "opacity" or "transparent" somewhere background becomes white
\begin{tikzpicture}
\fill[red, opacity=.5] (0,0) circle (1);
\end{tikzpicture}

Is this a bug or a feature?
How can I get transparent background with "opacity" somewhere?

 

Last edit: Victor Ivrii 2014-03-25