I posted this question over on the DAZ Poser forum a couple of weeks ago as Anybody recall the Poser fix to get Freak 4 working without that dent in his biceps ? because the Renderosity forums weren't working.

Kerya pointed me at Lyrra Madrill's Michael 4 arm fix freebie on ShareCG which does indeed fix the problem.

But what I'm actually after is the explanation, which I'm fairly sure that I read in a thread here on the Renderosity* forums.

I've used both Renderosity's own forum search and Google to try and find the thread, but with no luck.

Does anybody have the link ?

*it could have been the RDNA forums

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The 3Dcheapskate* occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.

*also available in ShareCG, DAZ, and HiveWire3D flavours (the DeviantArt and CGBytes flavour have been discontinued).