Altamira Composer
What are you going to "export" the composition to? Since Altamira Composer is a
unique program, no one else is dealing with multiple-image raster files.
(Though there's a lot of "smoke" out there.) As it stands now, you can save and
reload a composition of multiple images within Composer, but you're going to
have to create a single-raster file if you want some other application to use
the composition. It's a little like creating flics in AniPro, and then trying
to load them into PhotoStyler.
– Jack