Its a very strange behavior but looks that you are right. You can try export to DazCollada too, this will import better in C8, and I think this will be format that all Daz products will talk now.
But my question is always the same: if you can assemble the same scene right inside Carrara, why use DazStudio?? I think that the only answer is that you have an old scene that you want to load at Carrara for render... if you are starting a new one, begin right in Carrara is very more easy to use them DazStudio.

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