Voronoi following curvature of two lines

Hello Everyone,

     I have been asked to reinterpret an image with its elements remaining unchanged. By that, They mean, that the image cannot be altered. A careful look at the provided image reveals the grain of the wood along the bends. I have chosen to emphasize that texture, but i need help getting started with grasshopper.

     I would like to create a varonoi along the bands and having it gradually change as it reaches the bend simulating a stretch of the grain. I have the option to do this assignment in ink but I feel that this can really make my project stand out, I really have no idea where to begin though, and I would really appreciate any suggestions.