Tikzset style to disable blur shadow

Question

Is there a style with which I can disable a blur shadow that was already enabled? Disabling the draw and changing the fill can easily be down with appending the options:

draw=none, fill=yellow

but didn't see an wasy way to disable an exsiting blur shadow.

Note:

• One solution would be to define a \MyPicture* as per Temporarily disable Tikz shadow in pgfplots, but I would prefer to do this using a style, without changing \MyPicture

Code:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shadows.blur}
\newcommand*{\MyPicture}[1][]{%
    %% #1 = draw options.
    \begin{tikzpicture}
        \node [draw=red, thick,fill=magenta!25,  blur shadow, #1] {Text};
    \end{tikzpicture}%
}%
\begin{document}
\MyPicture
\quad
\MyPicture[draw=none, fill=yellow, blur shadow={}]% <-- How to disable shadow here
\end{document}

Answer 1

You can change shadow opacity parameter:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{shadows.blur}

\newcommand*{\MyPicture}[1][]{%
    %% #1 = draw options.
    \begin{tikzpicture}
        \node [draw=red, thick,fill=magenta!25,  blur shadow, #1] {Text};
    \end{tikzpicture}%
}%

\begin{document}

\MyPicture
\quad
\MyPicture[draw=none, fill=yellow, blur shadow={shadow opacity=0}]% <-- How to disable shadow here

\end{document}