# How to bridge edges without creating a twist?

I'm trying to model my first car in blender. I started by creating the front wheel arch and then duplicating it and scaling it to -1 in the Y direction to create the rear wheel arch. I then continued to extrude out the side of the vehicle from there.

Now I want to create a bridge between an edge towards the front of the car and one towards the back so I can model the area above the windows. When I select the edges and create a bridge (W > Bridge Edge Loops) I end up with a twist in the bridge:

I assume the edges have inverted Y axis orientations caused by me when I mirrored the wheel arches by scaling -1. I have tried recalculating all normals and playing with the Twist setting in the Bridge tool but I cant create bridge without the twist.

How can I fix my model so all faces, edges and vertices have the same Y axis orientation again?

• Have you tried to recalculate normals? In Edit Mode select the whole mesh with A and press Ctrl+N. – Paul Gonet Sep 8 '16 at 15:42
• Hi Paul. Yes I have recalculated the normals. Didn't make a difference. – John Sep 8 '16 at 16:02
• Instead of recalculating all normals, select only the faces that are incorrect and use Flip Normals on just those faces. Since those faces appear to be 2D, Blender might not be able to automatically recalculate the normals because it cannot tell which is the correct direct for them. – Chris Dunaway Sep 8 '16 at 17:23