Some points:

1. IK will be added soon. :)

2. interPoser Pro is $150.  But Greenbriars plugin suite (which doesn't have nearly as much feature support) is $375 and Reiss-Studio's BodyStudio (official static support) is $179 with no MacOS at all (and no R10 support yet).  BodyStudio is the non-free replacement for the old free Poser exchange plugins of which was discussed for Star Trek Aurora (only Poser 4 ProPack support - no Poser 5/6/7 support in those old plugins).  interPoser Pro supports Cinema 4D R8.2-R10, 64-bit and Universal Binary.

3. interPoser Pro definitely can't replace Poser completely, but it is a work in progress that will have continuous feature support added over time.

So, if you have money to purchase interPoser Pro and are on Windows and don't yet need R10 support, you might want to go with BodyStudio.  It has the best Poser support - since they have a direct contract with e-frontier.

I'm not advocating interPoser Pro and Cinema 4D either here.  Just providing info.  As noted, there are a large variety of options: Carrara, Vue, PoseRay, and others.  Also, note that if you are detemined to use Cinema 4D for rendering Poser scenes and can't afford BodyStudio or are on a Mac, interPoser Ltd works in a similar fashion for a fraction of the cost ($40).

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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