Melee weapons texture overlay

[SpartanISW108]

So I've tried looking on the GECK wiki for information relating to the melee weapons blood textures that get overlayed when striking opponents but can't seem to find any

I'm trying to look into how that system works as I would like to make a mod that puts a texture overlay on projectile weapons based on the condition of them (similar to how DayZ works with it's item condition) or if there is already a mod out there like this 

Any information or guidance would be helpful,

Thank you