What you are experience are jittering lines - that's the same problem when it comes to rolling credits.
So, basicly the amount of pixels the lines are travelling from right to left is to much to result in a smooth motion, and chances are high that you are not moving in full pixels per frame, but fractions of that. This result in anti-alaising and blurry edges.
The artwork itself, with it's hard contrasts, add up to the problem.
To resolve this, or at least make it less jitter, you can:
- retime the scroll, so it moves slower and in full integers per frame - like 20pixels/frame (you can see this in the speed graph)
- increase fps, so you effectivly moving less pixels per frame
- add motion blur or directional blur - downside: blurred edges
Those will help, too, but will change the look and feel:
- reduce contrast in artwork
- add grain
To be honest, the jittering isn't that bad. If you pay attention you'll see this everwhere, all for most in cinema.
But to fix this, I would retime the animation to a fast scroll into the room, followed by a very slow scroll through the room, followed by a fast scroll and repeat. This will also fresh up the animation.
*Martin