Until someone can replicate a fishnetty look, I've defaulted to the wrap theory. I tried a fluid pour with squeeze bottles but the lower layers of the soap get compressed and flattened out into circles by the upper layers. Ih that one, I tried tilting the mold so gravity might pull the soap into the more cylindrical shape but all of the bottom is thin and then without the compression, the top gets thicker shapes. The evenness of the whole thing has me perplexed. The heavy trace squeeze bottle one with fluid dark soap resulted in unevenness in the dark color and the light color comes out with too much of its own shape to make the pattern. Gah.
The saipua lady is such is go-getter and what an eye!
Have you tried to wait between layers? Maybe she was working with the really slow moving recipe and waiting for few minutes before bottom got a little bit of skin on the top. That's why, at least to me, what's on the bottom of the bar in photo looks like that was the top. White soap is definitely more spaced out and they are more round in shape. And there is more brown soap in between. It doesn't look uniform to me at all.
I so want to try it, but I'm really busy with studying until next weekend. I will try and give it a go.