"But the less items that depend on shaders and the material room and more on actual maps and textures, the better."

I would think that would be key. Perhaps the simplest solution would be a material file in poser that stripped out nodes on figures and so forth with a user check to make sure that all the correct maps were in place. And another that made the specularity and bump adjustments. That way the user would be working where they were most comfortable to get those initial files sorted and so there would be less chance of errors that would nuke the pz3

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