Adding complexity to graphmapper based generated surface

Hi, everyone!
Have this issue with a simple algorithm based on graphmapper domain transformation.
Currently surface transformation is based on using of 2 graphmapper (rich graphmapper) nodes. But I wonder if there is a possibility to add more complexity and 3dimensionality to the right part of the surface by using the 3rd direction.
Because currently the surface has the repetative shape based on graphmapper curves and the question if could we move points on the right side of the surface according to some attractor curve/ or using any other technique. The idea is in the diagram below.
Thanks a lot in advance for any comments.

190626_study to send.3dm (761.4 KB) (14.3 KB)