[Tex/LaTex] tiling a pattern for beamer background

Question

Is there a solution to have a given pattern (lets say as a .pngfile) tiled on the background (background or background canvas) for beamer-presentations?
I only find links to the wallpaper package, what seems to bring up many problems.

Answer 1

You can simply define a new canvas background:

\documentclass{beamer}
\usepackage{multido}
\setbeamertemplate{background canvas}{%
 \parbox{\paperwidth}{%
   \multido{\iR=1+1}{10}{\multido{\iC=1+1}{13}{%
      \includegraphics[width=1cm,height=1cm]{tiger}}\\}}}
\setbeamercolor{title page}{fg=blue}
\setbeamerfont{title page}{series=\bfseries,
  size=\Huge}

\begin{document}
\title{Hintergrundbild}
\author{Herbert Vo\ss}
\begin{frame}[plain]\maketitle\end{frame}

\frame{foo}

\end{document}