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Holes in Displacement Map

Hi everyone

I know what the problem is on this one but I need some help to fix it!

(see attach)

This is an imported OBJ. The torso and loin cloth are separate meshes (seen here as separate poly groups too) but share the same UV name (which overlap). I’m only looking to sculpt the loin cloth detail and export a map from that only. (The torso is there simply as a guide)

However when I export the dsplacement map you can see that I am getting some holes which I suspect are down to shared UV and/or the fact that they are not one complete mesh.

I have tried to project the detail onto a loin cloth only mesh but it simply projects the detail with the same hole errors.

Is there something I can do in Zbrush to get a clean map from the loin cloth?
Thanks

Attachments

Untitled-1.jpg