My husband looked at the fishnet one and says if you look at the corners it looks like the design wraps around the soap rather than goes through it.
I don't agree with the wrap theory, however, your husband may be on to something.
If you look really closely at the end of the soap in the back, it would appear that the pattern changes. It's really hard to see and if my theory is correct, then I completely understand why the maker didn't want the ends to be shown in the pictures.
Bear with me here. I'm hoping this makes sense.. I *think* this could be done with imbeds and tons of them. I think that perhaps the "ends" are actually the tops and bottoms of a loaf mold, probably a T&S.
The maker made a batch of white soap and let it set up. Then she cut this batch long way into little strip (I'm assuming about 1 inch wide). These strips are then trimmed diagonally as you would to make MP crystal soaps to form the oval-shaped white spots.
Then, the imbeds are placed at an angle in the mold, trimming the length to fit them in place. The black soap is then mixed up and poured at emulsion to thin trace.
After it hardens, the soap is cut as normal, not mantra style. The top and bottom of the loaf now become the sides of the loaf.
As I am a very visual learner, I'm attaching pictures of the drawings I made as I thought this out lol.