There are several rendering and shader enhancements.  Image Based Lighting and Ambient Occulsion, Gamma Correction and Indirect Lighting, Sub-Surface Scattering.  Did P6 have point lights?  Those are quite nice.  :laugh:

There are also Dependent Parameters (the valueOpKey ERC type handles differently than the others and may interest you a great deal), capsule zones and multiple zones per joint, animated origins and weight-mapping.  There have been various speed and simulation improvements for dynamic cloth and hair.  The Morph Brush tool is quite useful now, after a couple of versions of development.

The new GUI and library are also very nice additions.  Luckily you missed out on the P8 growing pains for those.  :lol:

One key irritation to watch out for is the changed handling of .obj export when multiple objects are exported at once.  Generally, though, the new version is much better than the old.  I can't think of any other new bugs or new changes which arguably fail as improvements.  Poser Pro 2012 is my favorite version of Poser, of all those I've used so far.

 

And I'm just name-dropping features of interest.    The best resource for the rendering and shader improvements would be (as ever) posts by Bagginsbill, here and at RDNA.  Dependent Parameters haven't really caught on as well as one might like, so far, and the best documentation for those is probably in the user manual.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.