Rey rides a home made speeder in The Force Awakens, much like Luke Skywalker drove an old land speeder in the original film. We pretty clearly know that The Force Awakens was made with digital methods, so that pixels showing the hovering speeder and its shadow are just overritten on top of the video representing the rest of the scene. Both the speeder and its shadow might be completely generated from algorithms that determine size, shape, color, materials, etc.
But such techniques were not available when Luke's land speeder was filmed in the 1970s. How were Luke's land speeder and shadow, etc filmed? Was Rey's speeder fully digital? Or was Rey's a combination of a physical prop with digital effects?