Tip: Unlock Normals

Sometimes when importing and exporting models, their normals get messed up. You can tell this because most likely there will be strange black spots on the model. What sometimes will be a quick fix will be to select the model and, on the polygonal menu set, go to normals>unlock normals. These problems happen sometimes when working with .obj files. A way to find out if this needs to be done is to go to normals>vertex normal edit tool. If the normals (hairs) are yellow, that means they're locked. The reason this happens is because when the normals are locked their X Y Z position hasn't changed even though the model has.