Hardware (IMAGE) Stanford University Caption A three-dimensional reconstruction of the reflective letter "S," as seen through the 1-inch-thick foam. Credit Stanford Computational Imaging Lab Usage Restrictions Image may only be used with appropriate caption or credit 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.