Invisible part of hair

[danny53]

Hi, I'd been editing for hours a character that I reskinned. I fixed almost all of the errors of textures but I still have one. When my character turns at one side, the a rectangular small part of the hair is invisible.

I don't know how to fix it, the texture file seems to be okay. Here is a picture:

 

                                

 

I hope you can help my. I want my character perfect

 

(I'm spanish so forgive my grammar pls)