Instead of building an image from individual marks I have tried using a whole image. Taking it into photoshop to trying and hide the joins of its repeating edges.
The first image is the original ink drawing, the second image is it in repeat and polarized. While I see the potential in this process I do not not feel it has fully worked here, you are too aware of slight areas of difference along the joins between tiles. Also there is one mark which is slightly to large, this jumps out at you making the repeat to obvious.