Team Blood Help?

In a gamemode I am currently making I would like to have the two teams have different blood textures. Both teams are human and combine models, and Iknow how to replace the textures in the folder, but not how to make the textures seperate for the two teams. Is a script needed? If so, what would it be? I apoligize if this post is in the wrong section.

I’m also interested to know, I’m working on something similar to this.