[O] How to use overprint in Beamer export

[Eric Schulte]

Hi,

I'd like to enclose a series of blocks which replace each other in the
Beamer overprint environment.

Here's the LateX I'd like to produce.

    % latex
    \begin{frame}[fragile]{The Things}
    \begin{block}{Things}
      \begin{description}[<+->]
      \item[foo] the first thing I want to talk about
      \item[bar] this is the second, follows the first
      \item[baz] third and final
      \end{description}
    \end{block}

    \begin{overprint}
      \onslide<1>
      \begin{block}{Foo}
        A picture of a ``foo''.
      \end{block}

      \onslide<2>
      \begin{block}{Bar}
        Some text about ``bar''.
      \end{block}

      \onslide<3>
      \begin{block}{Baz}
        Content relevant only to ``baz''.
      \end{block}

    \end{overprint}

    \end{frame}

I see no way to generate this from Org-mode given the folding behavior
of Org-mode outlines.  Namely the fact that there is no way to *close* a
heading.

Any suggestions appreciated.  Thanks,

-- 
Eric Schulte
http://cs.unm.edu/~eschulte