I'm sure this is a simple solution to someone out there but having trouble locating a specific answer looking through the other forum posts. I basically want to create a movie through After Effects so that each subsequent frame is multiplied onto the previous. This would produce the effect of say a blue dot moving creating a blue line instead. I can achieve this by copying the movie, moving it along one frame and multiplying everything but this creates a lot of duplicates and slow project and there must be an easier way of achieving this which I don't know about.
Have looked through the time based features like echo but I'm not wanting to change the time of the original movie, just overlay it onto itself through its whole duration which might get up to 4-5 minutes.
Would be grateful if anyone could help out there. Am using After Effects 5.5. Thank you.