...if you don't like railways, track vehicles, bike chains, and conveyor belts. When you make a poseable railway model, track vehicle, articulated bike chain, or a similar model, you connect several elements, which travel at a fixed distance between each other along a curved motion path. A common method to create an accurately curved and timed motion path is to rotate the elements around a fixed pivot along the curves. Depending on the model, the curves of the motion path may be of different radii and may require different rotation centers of the elements. To create different rotation centers in course of the motion, you use either "virtual" joints (additional invisible elements), or variable rotation centers. Virtual joints produce large data overhead, and complicate the animation setup. To keep it simple, you might prefer fewer elements with variable rotation centers. Some animation programs support variable rotation centers, others don't. In Poser, you can't animate the rotation center of a prop or actor. On the other hand, most (if not all) animation programs support only a limited number of transformation channels per object, typically 3 rotation channels and 3 translation channels. If you want to create more sophisticated rotations, you have to use virtual joints (such as "Target Helper Objects" in Carrara, "Null Objects" in Lightwave and C4D, "Effectors" in EI Animator etc.). In Poser, you can use a virtually unlimited number of transformation channels per object. You can add several parallel rotation and translation channels for one prop or a single bodypart. Because of this unique feature, Poser can be a very powerful tool for complex motions of single-body objects and rigid multibody objects. Multiple parallel channels are useful, for example, to create animatable rotation centers in Poser. This tutorial explains, how to implement different origins at the same time, and how to create a variable origin.