The present invention relates to a method of producing a phantom resembling a human or animal organ or tissue, the phantom comprising at least one first region having at least one tissue like property and at least one cavity having a plurality of hollow branches connected thereto, with at least some of the plurality of hollow branches being formed such that they project into the first region having tissue like properties. The invention further relates to a method of making the first structure and to a corresponding phantom.

A method for producing a three-dimensional (3D) object having excellent moldability and mechanical characteristics is provided. The method includes a molding step of irradiating a composition filled in the cavity of a mold with electromagnetic waves having a wavelength of from 0.01 m to 100 m, and molding the composition into the 3D object. The composition for molding a 3D object contains a solvent and at least one of a polymer and a polymerizable monomer.

A method of manufacturing a taxidermy mannequin includes providing a mold having an open end, a wall having an internal surface and an opposing external surface, and an internal cavity surrounded by the internal surface of the wall. The method further includes applying a layer of a mold release material to a portion of the internal surface, applying a powder material on an exposed surface of the mold release material, applying a layer of a glue mixture on an exposed surface of the powder material and the mold release material layer, applying a granular or fibrous material on an exposed surface of the glue mixture layer, allowing the glue mixture to at least partially dry, filling at least a portion of the internal cavity of the mold with a liquid expandable urethane foam, allowing the expandable urethane foam to expand and harden, and removing the taxidermy mannequin from the mold.