[Tex/LaTex] Overlaying with beamer, combining blocks and graphics

beameroverlays

I'm trying to combine graphics and blocks on a slide. Here is my code, i think it's quite simple to figure out what i want from it :

\begin{frame}
\frametitle{Outils}

\onslide<1->\begin{block}{Méthode de correction}
    \begin{itemize}
    \onslide<2->\item Mise à jour par simulation continue
    \onslide<5->\item Assimilation naïve des sorties (post-traitement)      
\end{itemize}
\end{block}

\begin{overprint}
\centerline{\includegraphics<3>[scale=0.4]{./plots/assim1_a.jpg}}
\centerline{\includegraphics<4>[scale=0.4]{./plots/assim1_b.jpg}}
\centerline{\includegraphics<6>[scale=0.4]{./plots/assim2.jpg}}
\end{overprint}

\onslide<7->\begin{block}{Scores}
\begin{itemize}
    \item<8-> CRPS et MAE
    \item<9-> Diagramme de Talagrand
    \item<11-> Diagramme de fiabilité
\end{itemize}
\end{block}
\begin{overprint}
\centerline{\includegraphics<10>[scale=0.29]{./plots/demo_tal.pdf}}
\centerline{\includegraphics<10>[scale=0.29]{./plots/demo_fiab.pdf}}
\end{overprint}
\end{frame}

So what i try to do is to make a block which parts come up progressively, and sometimes to display a picture corresponding to one of the item in the block. The picture must be displayed right after the block.
To make short, pictures must overlay each other while the blocks stay. Moreover, i want the second block (called "Scores"), to be situated right after the second block to take the position of the previous pictures. Is it clear ?

Many thanks to the people who'll think about it !

Best Answer

In this case I would recommend using the onlyenv environment, which is the same as \only. Moreover, use the [t] option to top align the contents to prevent "wobbling".

Code

\documentclass{beamer}
\usetheme{Madrid}
\usepackage{mwe} % provides images used in this example
\begin{document}

\begin{frame}[t]
\frametitle{Outils}

\begin{block}<1->{Méthode de correction}
  \begin{itemize}
    \item<2-> Mise à jour par simulation continue
    \item<5-> Assimilation naïve des sorties (post-traitement)      
  \end{itemize}
\end{block}

\begin{onlyenv}<3-6>
  \begin{center}
    \includegraphics<3>[scale=0.4]{image-a}
    \includegraphics<4>[scale=0.4]{image-b}
    \includegraphics<6>[scale=0.4]{image-c}
  \end{center}
\end{onlyenv}

\begin{onlyenv}<7->
  \begin{block}<7->{Scores}
    \begin{itemize}
      \item<8-> CRPS et MAE
      \item<9-> Diagramme de Talagrand
      \item<11-> Diagramme de fiabilité
    \end{itemize}
  \end{block}
\end{onlyenv}
\begin{center}
  \includegraphics<10>[scale=0.2]{image-a}
  \includegraphics<10>[scale=0.2]{image-b}
\end{center}
\end{frame}     
\end{document}

Output

enter image description here

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