Help with custom uncommon.

So I’ve been working on a custom uncommon infected for left 4 dead 2. So far, I’ve made a start, the model appears to be at least partially recognised, but they are all errors, some purpleish pink and some red. I’ve never done this kinda thing before, so some help would be appreciated.

Also, the visors remain parented, despite being suspended in mid air a few metres away, and they have bile jars stuck in the ground at their feet. I am replacing the CEDA hazmat guy, by the way.

Shits creepy man.