How To Position A Tattoo On A Character's Back? (CLOSED) (CLOSED)

I've watched a few tutorials on creating and placing tattoos, and I'm practicing placing them on forward facing parts of the skin.  None of the tutorials I've found so far address tattoos on the back of the character.

I would like to place some on the back of the character that span most of the back; a "tramp stamp" , for example.  My question is,  given that the skin mat is flat,  what is the best way to place the tattoo, and how do I get it to go across the back?  Is it necessary to cut the tattoo in half somehow?

If the answer is too involved to describe here, I would welcome a link to a tutorial that addresses tattoos on the back surface of the skin.

"is it necessary to cut the tattoo in half somehow?"
The answer is yes, I did a free bodypainting that proves that the left and right side of genesis back tattoo should be cut in half
https://www.renderhub.com/dorothee237/adult-bodypainting-for-g8f

Thanks for the reply!

I think I can cut the tattoo in half in Photoshop. How did you figure out how to place them on the skin mat?

Since you asked "what is the best way"... That would be to use software like Substance Painter or 3D Coat.
This way, you're working in 3D space and don't have to worry about lining up seams, etc. 

I'm sure there are newer videos out there, but I found these I had saved:  

 

Thanks for the reply, Foxy 3D!

I'm tempted to try out the Substance Painter software.   A $20 fee to use it for a month,  and hopefully learn  how to  apply and position tattoos on the backs of a few characters could be worth it.