Precedent: Eric Klarenbeeks’ organic 3d-printing Myceliumchair website
Klarenbeek has printed a chair from a straw substrate, with a thin coating of bioplastic, that supports the construction. He constructed a substrate with mycelium that is thin enough to be printed by a 3D printer. After the printing is done, the mycelium slowly grows into a strong substance. Once this chair is fully grown, it should be solid enough to support a person.