I do not speak of slideshow, so that that also has xcgal. but now that I see that it is the file is swf: http://www.guate360.com/galeria/data/media/2/tikal_templo4.swf
then I also ask 4images supports to uploader swf files? incredible!!
in another version of xcgal will be able to be obtained this effect? http://www.guate360.com/galeria/details.php?image_id=2 it is first time that I see this!