Furthermore, we demonstrated that compression deformation can also be programmed and recovered. To this end, we leveraged the advantage of photopolymerization by reacting the resin in a custom-designed mold with the shape of a QR code. The polyamide part was made with a textured surface that resembled the QR code (colored in black for contrast, Figure ). The part was subsequently flattened by a hot press, where the distorted QR code became unscannable. After heating, the textured surface was recovered and the QR code became scannable again. In summary, we demonstrated that these glassy, ductile polyamide networks are shape-memory polymers with robust programmability at ambient conditions. ). (C) Dogbone specimens being programmed to a new temporary shape, demonstrating torsional deformation. The original shape is maintained by heating to above Tg. (D) Programmed at ambient conditions, the deformed network polyamide can hold a hammer 500x its weight. When heated, the polymer actuated, and the weight was released. (E) Demonstration of shape-memory programming and recovery by compression strain. The polyamide network polymer featured a textured surface of a QR code. The QR code was pressed into a flat surface and was no longer scannable.