Smooth shadow of figure in beamer

Question

I want to add a shadow to some figures in my beamer presentation. So far I have found the fancybox package. However, its \shadowbox{} looks quite old-fashioned:

\documentclass{beamer}
\usepackage{fancybox}

\begin{document}
\begin{frame}
    \begin{figure}
        \shadowbox{\includegraphics[width= 0.8\textheight]{pic/test.jpg}}
    \end{figure}
\end{frame}
\end{document}

I am wondering if there is any possibility to create smoother shadows with beamer as they can be created in Powerpoint like this:

Answer 1

Package tcolorbox has option beamer for boxes with shadows for use in in cases as it is yours:

Image is in tcolorbox:

\documentclass{beamer}
\usepackage{graphicx}
\usepackage[many]{tcolorbox}

\begin{document}
\begin{frame}

\centering
\begin{tcolorbox}[beamer,
                  width=0.8\textheight,
                  arc=0pt,
                  boxsep=0pt,
                  left=0pt,right=0pt,top=0pt,bottom=0pt,
                  ]
    \includegraphics[width=\linewidth]{example-image}
\end{tcolorbox}

\end{frame}
\end{document}