Hi I have been trying to make an old model printable. Arrg! My test piece uploaded easily enough. But two trys and no Joy. INVERTED NORMALS! Q: Can rogue geometry inside the Mesh (free floating faces ect) cause a Normals problem, Or will it pick up as a Non Manifold error first. In Max there is a normal edit modifier but it will not work Globally if you have an Editable Mesh as your object. So is Blender an option. Can I turn my mesh into something else export it and re-import it. Sifting through every poly just is not an option. Thanks to anyone who can point me to a solution.