Correct. Peppers ghost only works when darkness hides the existence of the glass the hologram is projected on. In the Disneyland ride, a screen is not used to generate the hologram, rather a mirrored set is used and everything except the ghosts is pitch dark. The effect relies on the audience not being able to look underneath the track and see the mirrored setup. Tbh I don't buy the Deepfake theory. Those are hard to do well in a short amount of time. More likely they were prerecorded.