Faces Orientation, Backface Culling, and Flipped Normals

[Anonymous]

Can someone explain what's going on here...

The left wing of my aircraft is fine, the right wing (mirrored) appears not to have any issues.  When I highlight sub-d selections, it's highlighted in the brighter red.  When I use XView Faces Orientation however, it's highlighting green (indicating the faces are flipped).  But when I flip the faces, they are now inverted (all the normals are pointing inside the geometry) and the highlighted selection is the darker shade of red.  I have backface culling turned off.

I can't quite make sense of what's going on with this because it seems to be indicating the opposite of what's suppose to happen where highlighted green indicates the normals are flipped the wrong direction.

[Anonymous]

I did model a plane once and the issue was almost similar to yours. Flipped faces. Issue was with the mirror or symmetry that i had applied to my other half of model. Symmetry works better. Avoid mirror. I exported the model from max to maya but still i had to adjust each face on other side. Reset the transform & scale from hierarchy panel in case youre objects local normals arent perpendicular to surface. Keep everything a polygon.
Bottom line: After symmetry, export the model & import it back. Try obj, fbx both.