1. A method for use in 3D movie production comprising: displaying a plurality of composite nodes as a composite node graph on a display device to a user, the plurality of composite nodes indicating how to composite a first plurality of rendered 2D elements into an output image, the first plurality of rendered 2D elements and the plurality of composite nodes corresponding to a first eye of a 3D image; and receiving, on a processor based system, user input to add one or more transition nodes to the plurality of composite nodes of the composite node graph, each transition node following a respective composite node of the composite node graph and used for regeneration of one or more elements corresponding to the respective composite node, wherein the plurality of composite nodes corresponding to the first eye of the 3D image and the one or more transition nodes are used to direct generation of a second eye of the 3D image, wherein, each of the one or more transition nodes indicates how to regenerate at least one of the first plurality of rendered 2D elements corresponding to the first eye of the 3D image to generate at least one of a second plurality of rendered 2D elements corresponding to the second eye of the 3D image; and wherein the 3D image comprises the first eye of the 3D image and the second eye of the 3D image.