http://www.poserpedia.com/index.php?title=Poser_Figures

found by entering "history of Poser characters" into Google, and skipping all links to SM. halfway page 2 that was.

I have a tiny section on Poser history, and that of the Poser characters, on my site. To save you the trouble finding it, it reads:

So, the introduction of Poser 5 was a milestone in its history, and a heavy one. Next to the software and its functions, it had impact on content and future developments as well. Up till then, DAZ had created the Vicky and Mike characters (versions 1 and 2) based on the P4 female and male, which as such were Zygothe products. The turnover to Poser 5 brought some serious licensing issues between MetaCreations and DAZ, and the latter decided to go their own way.

This own way introduced the unimesh geometry, the wish to create all characters from one single mesh. Vicky and Mike 3 introduced that concept, soon to be followed by Stephanie 3 which was a real-person body scan translated to the unimesh. DAZ also had their own view on the software, which brought us Daz Studio consisting of a free base with paid plugins – just a completely different marketing concept compared to Poser. Boths DAZ views developed, and after a successful rebuild of Vick and Mike 4 using the new modo modeler, and after successfully turning Girl 4, Steph 4 and so on into morphs of Vickys mesh, DAZ launched Genesis – the new generation unimesh, with all known figures (Vick and Mike 5 included) provided as morphs of that base mesh, and including a serious Poser contender Daz Studio 4, at the turn of 2011/2012. The weight-mapping mechanisms for smoother posing forced Smith Micro into similar features for Poser 9 / Pro 2012. But mainly, the full features of the new DAZ characters could not be deployed in Poser at the fullest, you needed DS4 for that. This came as a serious chock to the Poser community. Being “Poser-compatible” was not the default anymore.

For what it's worth, but it might give you a start. And perhalps we can answer specific questions on specifuc characters.

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though