Hello,

A typical problem related to how Poser process the rotations. In Figures, the solution is to rotate the figure using the BODY dial but linking the dependent rotation to the hip but for a prop, I don't know. On one thread in this forum, I saw recently the solution of parenting the prop chair to another prop (I will call the last one  the guiding prop) which is used to rotate the chair in space (If I remember, Lesbentley was involded in this thread) . This guiding prop should be made invisible or very small so that it will not be visible because of the translation of the rocking chair. With this approach, the rotation system of the chair is rotating with the parent prop keeping the original rotation axis of the chair . Some adjustments should be done to the visibility of rotation dials of the chair so that rotation dials of guiding prop is what the user is seeing.

The other solution is to code complex dependent parameters that will rock the chair around the right axis when the y rotate is used to orientate the chair. However, doing that in 3D is a very big challenge.

Allstereo