Location of Sweat Overlay images?

[Manly5000]

Hey all,

 

I was hoping to modify the Sweat Overlay files for both males and females to add "wetness" to the vagina and penis when the overlay textures kick in.  I looked through the Wicked Whims tuning package but couldn't seem to find it.  Can someone tell me where they are and what type of file they are?

 

Thank you so much!