There is called a Flip Normal button in CLO3D that save you time and headage to sew facing. How to sew facing on a dress in CLO3D quickly and easily. See the link to watch a step by step on how to sew facing tutorial as well as a full script. https://www.encoderfashion.com/how-to-sew-facing-quick-and-easy-in-clo3d/education/