I want to have objects on escalators that are going downward and are also moving left and right, while the object stays perfectly in the middle moving downward (with it's own speed)and not shaking, etc.
1. There's a line of objects moving down the escalator constantly and it isn't a loop, they meet a definite end at the bottom of the escalator.
2. The escalator moves left and right frequently.
3. The path can not be a solid, because it will interact with other objects.
How can I keep the objects moving downward perfectly on this moving path?