Visual effects involve the integration of live-action footage with computer-generated imagery to create realistic environments that cannot be captured on film, through techniques like bluescreening/greenscreening, miniatures, animatronics, and computer-generated 3D characters. Compositing is the combining of visual elements from separate sources into a single scene to create the illusion they were shot together, and involves techniques like motion capture, match moving, rotoscoping, and CGI animation through skeletal rigging.