You don't have to do anything special, nor to quit using the background
package; due to the way frames are built in beamer
, you simply have to add the background material to the appropriate template:
\setbeamertemplate{background}{\BgMaterial}
this is exactly what the \BgMaterial
command was designed for. A little complete example:
\documentclass{beamer}
\usepackage{lipsum}
\usepackage{background}
\backgroundsetup{
placement=center,
scale=4,
contents={DRAFT},
opacity=1
}
\setbeamertemplate{background}{\BgMaterial}
\begin{document}
\frame{\lipsum[1]}
\end{document}
