Illustration done for a paper through MIT that describes 3d printing and growing cells on lattices. Growing cells on lattices like these allows control over the shape for medical use and research.
The cells were modeled by placing metaballs along hair particles grown from simple geometry and attracted to points on the lattice.
The paper this was done for was featured on the cover of the journal Nature Microsystems & Nanoengineering, the MIT homepage (http://www.mit.edu/archive/spotlight/cell-scale-3-d-printing/) alongside other news sites.