Quote - ...to change resolution to a single body part, in theory, you can match the vertex count at the boundary.

Only if you know the resolution of the adjacent parts, or are willing to switch them accordingly. Geometry switching wouldn't do this by itself, but it might be possible with dependent parameters, Python or maybe even clever ERC coding.

Or, as seems more likely, Poser might fall down while frothing at the mouth, figuratively speaking. :)