Hi John, 
   this solution using tables was indeed inspired from your post, I am so sorry, I should have refered to it...

I suppose that the feature has not been implemented yet. I am now thinking of generating a panel with imagemagick before including it in the org buffer, for example with

#+begin_src sh
convert +append image1.png image2.png panel.png
#+end_src

and hence 

#+CAPTION:
[[panel.png]]

to have the two images side by side both in the buffer (with C-cxv) and the latex pdf (within a figure environment).

Is there a cleaner org solution that I would have missed ?
Thanks again,
Martin

> Date: Wed, 11 Sep 2013 21:47:08 -0500
> Subject: Re: [O] LaTeX export: images subplots
> From: jw.hendy@gmail.com
> To: mart_00@hotmail.com
> CC: emacs-orgmode@gnu.org
> 
> On Wed, Sep 11, 2013 at 8:56 PM, Martin Leduc <mart_00@hotmail.com> wrote:
> > Hi all,
> >   I am using org-mode to write a report with several figures. I would like
> > to group some images into a same figure, let say a 2x2 panel. I know that I
> > can directly embed latex code in my org file, for example by using the
> > subfloats (from the latex subfig package).
> >
> > However, I would prefer to use an org-based solution of inserting the image
> > links in order to keep the convenient way of previewing images right into
> > the buffer with C-c C-x C-v.
> >
> > The only solution I found is by using tables such as:
> >
> > #+CAPTION: Insert caption here.
> > #+ATTR_LATEX: :align p{0.5\textwidth}p{0.5\textwidth}
> > | [[pathtoimage]] | [[pathtoimage]] |
> > | [[pathtoimage]] | [[pathtoimage]] |
> >
> > where the size of the images is controled by p{} and C-cxv is working.
> > However, in the exported TeX file, it is a table, not a figure. Is there a
> > cleaner way to make image panels that would preserve the figure environment
> > in the exported TeX file ?
> 
> Just wanted to cite my similar (same?) question from a bit back:
> - http://lists.gnu.org/archive/html/emacs-orgmode/2013-03/msg01800.html
> 
> The only suggest I got was to use the subfig package, which may
> actually be something like what you're looking for.
> 
> I guess p{width} /could/ work for what I was going for, but I will
> often stagger images and my own "captions" via the org table:
> 
> #+ATTR_LATEX: :align p{0.5\textwidth}p{0.5\textwidth}
> | [[pathtoimage]] | [[pathtoimage]] |
> | /blah blah/  |  /blah blah/  |
> |   |   |
> | [[pathtoimage]] | [[pathtoimage]] |
> | /blah blah/  |  /blah blah/  |
> |   |   |
> 
> I don't like using p{} because everything is left aligned and I like
> to center the images and the "caption" text below each one.
> Unfortunately, there's no centered equivalent to p{}. Thus, I end up
> using \includegraphics[widt]{} manually.
> 
> Anyway, sorry if that's off-topic. Just wanted to voice that I have a
> use for this general sort of thing as well. Heck, I think even
> applying the beamer columns principle to LaTeX article classes would
> work and be quite neat.
> 
> 
> Thanks,
> John
> 
> >
> > Thanks a lot,
> > Martin
> >
> >