A rig remover is a stopmotion pro software app that is incredibly useful. It's too complicated to explain so I'll let you guy look it up at . The idea is to remove object from your screen(props) and it can really help to make objects fly. I haven't been able to purchase this, so I made one of my own. I used a white background base, and painted the props I used out of the picture. It helps to turn the contrast/brightness up on your camera.