Well one thing is for certain, the way that the Poser4 nude woman's groups are spread out through the .obj text is an absolute mess. Importing her into wings showed an import group count of 4815 groups, probably because all of her body parts are sectioned into countless same named mini groups. Your Nea .obj is alot neater (file says it was run through UVMapper so that's probably why it is). All those groups are making wings lag like crazy, which is funny cause it's a low poly mesh and I've gotten wings to handle upward to 800000 polys before. Anyway, brought the mesh into both wings and zbrush and everything looks ok with the vertices as far as the seams go. I don't know, I'm totally stumped on this one. One thing you should be aware of, Zbrush is indicating 26 Ngons in your Nea .obj, whereas an import of the original Poser4 Nude Woman .obj indicates only tris and quads.

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W10 Pro, HP Envy X360 Laptop, Intel Core i7-10510U, NVIDIA GeForce MX250, Intel UHD, 16 GB DDR4-2400 SDRAM, 1 TB PCIe NVMe M.2 SSD

Mudbox 2022, Adobe PS CC, Poser Pro 11.3, Blender 2.9, Wings3D 2.2.5

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