Hi, I’m new to Zbrush, I’ve been working with it for about two/three days now. Right now I’m working on a model for our school game project semester and I’m making her belt that also holds her skirt up.
My problem is that the belt that I made was through masking the pattern on her skirt then extracting it. But then when I go and check the belt it looks like it’s doubled itself. Here’s a picture of what I mean.

Now how do I remove that doubled piece that’s inside the belt? And why does this happen? Cause it also happened with a bag that I made for my model(sort of fanny pack-kinda bag).