To go back in history.

I wrote above about the initial link between Poser and Max.(Yes, yes, I am an old timer, LOL, because we are talking middle of the 1990's here.) But, and here comes the but.....

I think, (but have to check) that BOTH apps, Poser AND Max are BOTH unable to export a properly vertex grouped and welded obj file. Poser is not the only app out there to still have this double vertex at welds issue.