Experimentation with the attractor logic. Here I used a lofted surface as a base geometry to tessellate a circular/tubular module whose extrusion depth varies with the distance of the attractor from the wall.
Point. Pattern. Attractors. Use these basics to experiment with various shapes, multiple attractors with varying degrees of attraction. This is a very simple 2 dimensional example, don't be afraid to try effecting geometries that are distributed on a 3 dimensional surface.