The thread 3D voronoi discusses how to create such a shape using something called topologizer with the Dendro plugin.
In Version 7, is it possible to create such a shape perhaps with SubD, i.e. without extra plugins?
In the end I want to use this method as the basis for modelling a strangler fig growing along a pipe, or maybe around a torus. It doesn’t need to be super realistic, just needs to look nice to get the idea across.