ALT A) (i) Photograph of trabecular bone structure and (ii) fluorescence micrograph of auxetic patch fabricated through CLEAR. Scale bars, 10 mm. (B) Multimaterial CLEAR printing through the switching of liquid resins and visualized with different fluorescent tracers (yellow and gray). Fluorescence micrographs of a multimaterial hydrogel in the shape of (i) a lattice (z direction) and (ii) an axial patch (xy direction). Scale bars, 5 mm. (C) Photograph of stiff hydrogels processed into porous, flexible patches that (i) conform to an underlying curved substrate and (ii and iii) are extensible. Scale bars, 30 mm. Shape recovery without permanent deformation demonstrated through (D) (i to iv) compression of auxetic octet-truss lattice and (E) (i to iv) stretching of 3D coil. Scale bars, 10 (D) and 5 mm (E).