TuskerRaiderBob wrote:The images are numbered, I changed their filenames so that they are no longer numbered and that seems to have fixed it!
Why would they 'run 'out' if they're numbered? I don't quite understand the logic.
By default, a set of numbered images is processed as an image sequence--that is, video converted into frames. Fusion is designed to work best with these sequences rather than video files because that is how visual effects artists generally work (for a number of reasons that I won't go into here).
So when you imported the images, instead of being treated as individual images, they were treated as a very short clip, and when the clip ran out of frames, it vanished.