[Mark's Edit — the True Blood poster is basically a fan photoshop, not an official image]
I am probably not the first person to point this out… This was a promo piece from the first season of the CW's Arrow showing Stephen Amell with the scars he got from his five years missing.
This is a promo piece from the final season of HBO's True Blood showing Joe Manganiello covered in scars…
Now, I'm no expert… but aren't those the exact same scars? There is either a standard "jacked up" scar kit or someone had some fun with photoshop. Then again, looking at the neck it may just be the same body with a different head.