User blog comment:ChishioKunrin/Why the introduction of ABRN is not a bad thing/@comment-25405817-20150823005059/@comment-4010415-20150825063126

Did they? I don't remember. Though, what you said reminds me of the image I saw that showed how complex the structure of Blake's hair is.

I suppose that, in order to properly make a hair model for Raven, it would've taken them a fairly good chunk of time, and they didn't have the time to do that, especially considering they barely finished making Breach in time for the DVD. It really would have been easier for them to take hair that's already completely and properly made and rigged and just slap a different texture on it.

There's also the fact that the outlines on the hair (and every other part of the character's body) are made by encasing the hair model in an inside-out model of the same shape.