3D Printing a Complex Part (IMAGE) Optica Caption Researchers have developed a new laser-based process for 3D printing intricate parts made of glass. It uses multiphoton polymerization to create the object directly in a 3D volume. Credit Laurent Gallais, The Fresnel Institute and Ecole Centrale Marseille Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.