Image 1 (IMAGE) Singapore University of Technology and Design Caption Fig. 1. Given (a) the scanned face model of a subject, we develop an optimization-based approach to design (b&c) a PAP mask cushion that fits the face model. (d) The designed mask cushion is fabricated and assembled with a generic mask frame to form a custom-fit PAP mask for practical use. Credit SUTD Usage Restrictions Image should be used with appropriate caption and credit License Original 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.