Zbrush to Maya - black spots?

graphicalglitch

I've got a sculpt made in Zbrush that I've been retopologising in Maya, but I've just noticed some strange black spots on the model where the geometry seems to be clipping through itself? It doesn't look like this in Zbrush, but they show up here and whenever I try to transfer maps to the low-poly version they show up. Any advice?

cryrid

If the geometry is clipping in Maya, then it's simply clipping. This would be very likely if that sleeve has inner geometry. Zbrush doesn't display back-faces by default so this kind of error is harder to notice when you are sculpting on thin volumes. You have to enable it under Tool: Display Properties: Double. 

You might be able to set up the baker to ignore backface hits if you don't want to go in and fix the actual geometry, but the latter should take long to do either.  

graphicalglitch

Aah, didn't realise Zbrush had backface culling on by default, thanks for the heads-up.