Possible Duplicate:
Faded drop-shadow using tikz-based rounded rectangle?
I would like to add a soft drop shadow to this node (holding text):
\usetikzlibrary{fit,shapes,shadows,fadings,patterns,calc,positioning}%
\begin{tikzpicture}
\node[shape=rectangle,fill=white,inner xsep=.5cm,inner ysep=.5cm,text width=5cm,text depth=1\textheight](box){Text goes here (actually, a minipage)};
\end{tikzpicture}
I understand that I can add a simple drop-shadow simply adding the option dropshadow, but how do I make it fuzzy, and how do I control the radius of the fuzziness and the x,y offsets from the node 'box'?
I have tried to emulate the effect with a rectangle positioned to the right of the node, using the options color=black,shape fading=east, but it ends up completely transparent.
(Yes, I'm a complete tikz newbie.)