A self-supporting composite material is made with a shape conforming to the shape of an enclosure within which the composite material is incubated and molded. In on embodiment, a lid with at least one extrusion is placed over the enclosure to form a void in the final product corresponding to the extrusion. In another embodiment, a tool with extruded features is pressed into a face of the product in the enclosure to mold features into the finished product.
