Load the dynamic clothing.
Run the sim as you normally do.

EXPORT the object now.
File => Wavefront export
Work with that object file in Zbrush.
Save as object file from Zbrush, and import back in Poser.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
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