Michael Licavoli shares a simple technique for fixing normal orientation on an already bound model and animated in Maya.
…In this video I will show you a simple technique that repairs flipped normals on an object that has already been skinned and animated within Maya…
In order to catch every tiny thing that may have snuck past everyone on your team, you should make sure the normals are properly aligned in models and scenes before they’re animated.
The normals in this situation can be fixed by exporting the selected model as an OBJ file and reimporting that into Maya. Michael proposes a super simple method, where you just need to skinning new models with weights transferred from original ones- all without any complicated tools or processes!