Missing faces

[system]

I exported an obj of a head I’ve been working in maya into zbrush and the faces on the ears are missing. Double sided button does the trick but when I turn it of the faces vanish. In maya those faces are a strange shadowy color like a triangle, or a quad with a line in a middle the head is all quads. It has happened before and I had to delete the head and start from zero again. Please help any advice will help.

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[Lumin8]

I exported an obj of a head I’ve been working in maya into zbrush and the faces on the ears are missing. Double sided button does the trick but when I turn it of the faces vanish. In maya those faces are a strange shadowy color like a triangle, or a quad with a line in a middle the head is all quads. It has happened before and I had to delete the head and start from zero again. Please help any advice will help.

The normals seem to have been inverted just in the ears. I have had this happen in Max before too, except on other parts of the mesh. Try this… http://www.gamedev.net/topic/518310-flip-faces-in-maya/