I've downloaded a character for a certain game, which I'm using as a reference whilst I make my own. However, I've come across a few texture maps that I've not heard of before, and I can't find much (if anything) online about them, their purpose, or how to make them. Maybe I'm not putting the right names into Google...?
The first one is called a Blood Mask. I'm guessing this is to make the character's face redder...? Possibly when they're in cold environments...? It looks like this...
The next one is just simply referred to as Mb, which is very blue looking:
The third one is just referred to as Ma:
And finally, the last one is similar to the previous, but has been used for the hair and uses darker greens with some orange:
Any help would be appreciated. Thanks.