Why is my Metahuman's hair transparent when this one specific material is behind it?

I made this fog material I put on a plane. When I put this Metahuman in front of it, I can see through the Metahuman’s hair. What is happening and how can I fix this?

I’ve been looking around and I can’t seem to find the place to modify the base material for the hair in the sample crowd pack Metahuman. Anyone know where I can find that?

Does no one have any ideas why this might be happening? I asked around on other forums and they told me things like “the hair has transparency”. I don’t know why only this one material would show through then. It has got to be the material, not the hair, right?

Some types of transparent materials have different orders in rendering. I do not know much about meta humans and the capability of editing them, but is there no way to change the type of transparency of the hair material? If not that, then can you try experimenting with the different types of transparencies for your fog material? (or is that a volumetric?)