No solution, yet.

Vilters noticed that the mesh is unwelded and not perfectly symmetrical, but I don't think that's the root of the current shader problem.

Remember, PP-2012 and vanilla PP-2014 had no problems with the figures. Only SR1 found a few vertices it refused to digest.

All 3rd gen DAZ meshes unweld when exported from Poser, but they re-weld fine once you turn them back into a figure.

(And before someone says it, if you import the original DAZ geometry into Wings, it gets split into hundreds of tiny groups scattered all over the mesh, so I need to use the exported file to preserve the original grouping.)

And the slight asymmetry is caused by rounding errors between ZBrush, Wings3D, PoseMorphLoader and the Poser object ex/importer. Poor thing must have been ex- and imported a few hundred times in the last ten years.

Never bothered to fix it as real humans aren't perfectly symmetric, either.

(Actually several faces I sculpted I made intentionally asymmetric to add a bit of personality.

:-)