This object was evolved (not hand-designed) on EndlessForms.com, where objects are evolved in the same way that plants and animals are bred. You pick the ones you like and they become the parents of the next generation of objects. As in biological evolution, the offspring look similar, but not identical, to their parents, allowing you to explore different designs. Under the hood, there is an evolutionary process in which the genomes of parents are mutated and crossed over to produce new offspring objects. Additionally, the objects are grown from their genomes similar to how a single fertilized egg grows into a jaguar, hawk, or human. This grounding in developmental biology enables the evolution of complex, natural-looking forms. Check out the site. It's free!