Not sure if this is a known issue or not but when I saved the default CC4 Camila character out to an .USD file for path tracing rendering, I get this one rouge white polygon in the brow section of her face in Omniverse Create (latest version). The issue doesn't seem to show up when I save out a USD with real time rendering path.

Hi,
This has to do with the transparency map use on the Female_Brow_Base__material. You will need to update
the settings for the Female_Brow_Base__Opacity.png map on the material and how its used...it may be that you need
to use the red channel map or adjust the the material shader itself to either dither or use the map correctly

It is a transparency error, but easy to fix.
In CC select Brow base material, right mouse click on Base map and Copy. Then right mouse click again and Paste. Then export.

I finally got a chance to circle back around and try this. And, yep, that was it.
Appreciated!

Another fix for this issue:

Under "Looks" select the Female_Brow_Base material; In the Properties panel, scroll down to opacity and enable "Opacity Cutout". Then adjust the Threshold to anything above 0.91