ZBrushCentral

Problem with the Ear!

I create the model the ear in Maya after I finished it

I use GoZ to import it to Zbrush and it is imported perfectly fine.

But there is a problem with the geometry in Zbrush.

It disappears.

This is the model in Maya
Ear_001.jpg

when imported to Zbrush
Zbrush_Problem.jpg

I still can see when I rotate to the back of the ear
Zbrush_Problem_2.jpg