I've been reading threads about tattoos and I was wondering if there's an easy way to apply a tattoo in any texture.

Right now I'm using this configuration

But I feel like I'm making life difficult for myself. There must be an easier way to do it. Perhaps a way to make a mask without making two different texture maps? I've tried using only a color_math but the skin of the area comes out darker or lighter according to the tattoo.

When I use ezmat the tattoo dissappears completely. I was hoping I could use VSS but it doesn't work for some reason and I like ezmat's skin output better anyway.

I made a partial MATpose and added only the tattoo nodes but the rest of the map was gone. I then thought to use easyskin Effects but I was lost when I looked at the coding.

I hope there's an easier way to do this. I just want to add the nodes without any specific texture and keep the rest intact. Any advice?