TheUMovieGraphFileOutputNodenode defines a output file format that MRQ may place produced render data into. At runtime, the individual pieces of render data will be generated by the Movie Graph Renderer, and then all data will be collected into a single datastructure by the FMovieGraphOutputMerger before being passed back into the main Movie Graph Pipeline. Once this happens, the CDOs deriving fromUMovieGraphFileOutputNodewill be given a pointer to the information for the whole frame, so they can decide what to do with it. There are potentially multiple output formats at once (such as exr and jpeg).