"In order to create a changeover of images where the original." Brothersoft Editor: n order to create a changeover of images where the original is folding to create a new image, just download the"Flap Transition Effect". It can easily be applied to the Flash Timeline an ActionScript using Windows or Mac OSX and does not require any additional programming work. This filter is compatible with Flash 8, CS3, CS4 and CS5 and works as a plug-in for any existing projects making this the perfect component to save time and money. The manipulation of the images creates a .swf file which means this the perfect tool to create any 'cat flap' transitions.