Sorry for not getting back here sooner. I just want to fill in, that if you select several bones at once (ctrl-click on pc), like e.g. the whale's tail above, you get a sort of easy-pose effect, bending it smoothly. At least I've done so with an imported DAZ horse (the tail).

DAZ Studio collada export allows the figures to import as "rigged meshes" in Vue. So most Poser figures can be poseable in Vue as well, and with a lot more bones than the C3D ones (at least the ones I know). Of course it's best to work on expressions etc. in Poser or DS, but it is possible to e.g. adjust the eyes etc. directly in Vue with those. The C3D ones are primitive in comparison, IMO.