I tried to apply tatoo on V3 with the blender node but it change the color of the texture aside the tatoo. I failed in using PNG and GIF with an alpha channel, I don't know if Poser supports it...

So I used the color_math node with the MIN function, as the black tatoo appears to be the min color. With that function the main texture is not changed in color. My tatoo is JPEG with white background.

The tatoo has to be adjusted to fit the desired place and it's difficult to make fine adjustments.

Also when I decrease the size, the tatoo is displayed several times, I don't know how to avoid that.