My in-game meshes are inverted in unity after importing from 3ds MAX with skin

Question

My in-game meshes are inverted in unity after importing from 3ds MAX with skin,

both the mesh and the normals look "upside down", like if i was looking at some kind of ghost.

if i uncheck skin, it works correctly.

Answer 1

step 1 : setup the model and export as FBX.

step 2 : import in unity. the vertex and the normals will be flipped.

step 3 : attach this c# script, and run ONLY ONCE.

public class meshInverter : MonoBehaviour {

    // Use this for initialization
    void Start () {
        Mesh mesh = GetComponent<SkinnedMeshRenderer>().sharedMesh;
        mesh.triangles = mesh.triangles.Reverse().ToArray();
    }

    // Update is called once per frame
    void Update () {

    }
}

step 4: remove last script, attach this JS script, and run ONLY ONCE:

#pragma strict
import System.Linq;
function Start () {
    var mesh = (transform.GetComponent("SkinnedMeshRenderer") as SkinnedMeshRenderer).sharedMesh;
    var normals : Vector3[] = mesh.normals;
    for (var i=0;i<normals.Length;i++){
        normals[i] = -normals[i];
    }
    mesh.normals = normals;
}

function Update () {

}

step 5: remove last script, and now that the model is fixed.

Edit

Make sure too that your bones o mesh doesn't have any negative scale, that could fuck it up too and would not be a .fbx export failure.