[Tex/LaTex] Different background for section page in Beamer

beamersectioningtikz-pgf

On this picture you can see a titlepage, a section page and a content page done in Powerpoint:

powerpoint template

How to modify this code so that the section page has the background shown on the image? I can do the text positioning by myself later on.

\documentclass{beamer}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{tikz, datetime, textpos}
\yyyymmdddate \renewcommand{\dateseparator}{.}

\definecolor{MedianBrown}{RGB}{119,95,85}
\definecolor{MedianLightBrown}{RGB}{235,221,195}
\definecolor{MedianLightBlue}{RGB}{148,182,210}
\definecolor{MedianOrange}{RGB}{221,128,71}
\setbeamercolor*{title page header}{fg=white}
\setbeamercolor*{title}{fg=MedianLightBrown}
\setbeamercolor*{author}{fg=white}
\setbeamercolor*{date}{fg=white}
\setbeamercolor*{item}{fg=MedianOrange}
\setbeamercolor*{frametitle}{fg=MedianBrown}

\setbeamertemplate{navigation symbols}{}
\setbeamertemplate{blocks}[rounded][shadow=true]
\setbeamertemplate{background}{
  \begin{tikzpicture}
  \useasboundingbox (0,0) rectangle(\the\paperwidth,\the\paperheight);
  \ifnum\thepage>1\relax% Not the title page
        \fill[color=MedianOrange] (0,8) rectangle(0.8,8.3);
        \fill[color=MedianLightBlue] (0.9,8) rectangle(\the\paperwidth, 8.3);
  \else% Title page
      \fill[color=MedianBrown] (0,1.5) rectangle (\the\paperwidth,\the\paperheight);
      \fill[color=MedianOrange] (0,0.1) rectangle(3.45,1.4);
      \fill[color=MedianLightBlue] (3.55,0.1) rectangle(\the\paperwidth,1.4); 
  \fi
  \end{tikzpicture}
}

\setbeamertemplate{title page}
{
    \begin{textblock*}{12cm}(3cm,2.8cm)
    \begin{beamercolorbox}[wd=8cm]{title page header}
      \usebeamerfont{title}\usebeamercolor{title}\inserttitle%
    \end{beamercolorbox}%
    \end{textblock*}
    \begin{textblock*}{12cm}(-0.5cm,4.9cm)
        \begin{beamercolorbox}{date}
          \usebeamerfont{date}\insertdate%
        \end{beamercolorbox}
    \end{textblock*}
    \begin{textblock*}{9cm}(3cm,4.9cm)
        \begin{beamercolorbox}{author}
          \usebeamerfont{author}\insertauthor%
        \end{beamercolorbox}
    \end{textblock*}
}

\setbeamertemplate{frametitle}
{
    \vskip0.3cm
    \begin{beamercolorbox}{frametitle}
        \insertframetitle
    \end{beamercolorbox}
}
\setbeamertemplate{items}[square]
\setbeamertemplate{sections/subsections in toc}[square]

\author{Author Name}
\title{Quite A Long Title For A Simple Beamer Presentation}
\date{\today} 

\begin{document}
\frame{\maketitle}
\section{Introduction}
\frame{\sectionpage}
\begin{frame}{My presentation is about\ldots}
\begin{itemize}
\item Some stuff
\item And some other stuff
\end{itemize}
\end{frame}
\end{document}

Best Answer

I'll add my answer too, the approach is the same of Bordaigorl but with less code involved.

The idea is to create another \setbeamertemplate{background} and embed it into a custom command to be used instead of \frame{\sectionpage}

The custom command will redefine the background and then the section page template. Just as an example I used a tikzpicture to reposition the section head.

This is the custom command:

\newcommand{\mysectionpage}{
    \begingroup
    \setbeamertemplate{background}{
        \begin{tikzpicture}                                         %edit this tikzpicture to customize the size and colors of the background rectangles
            \useasboundingbox (0,0) rectangle(\the\paperwidth,\the\paperheight);
            \fill[color=MedianOrange] (0,7) rectangle(0.8,8);     
            \fill[color=MedianLightBlue] (0.9,7) rectangle(\the\paperwidth, 8);
        \end{tikzpicture}
    }
    \setbeamercolor{section page}{fg=white}
    \setbeamertemplate{section page}{
    \begin{tikzpicture}                                             %edit this tikzpicture to customize the appearance of the section heading
        \node[overlay] at (1,2) {\insertsectionhead};
    \end{tikzpicture}
    }
    \frame{\sectionpage}
    \endgroup
}

The rest of your preamble code stays untouched. The body of the document will look like this:

\begin{document}
\frame{\maketitle}
\section{Introduction}
\mysectionpage                                 %new code
\begin{frame}{My presentation is about\ldots}
\begin{itemize}
\item Some stuff
\item And some other stuff
\end{itemize}
\end{frame}
\end{document}

The result is:

enter image description here

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