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Solution to 3ds max .fbx messed up (flipped) normals

Discussion in 'External Tools' started by IgorAherne, May 12, 2017.

  1. IgorAherne


    May 15, 2013
    When bringing my .fbx models into Unity, I've encountered the error where the normals are interpreted incorrectly.
    nail 1 flipped.JPG

    I wouldn't want to "calculate" normals within unity, since I've carefully crafted them inside 3ds max, using Edit poly smoothing groups (or simple Edit Normals modifier)


    To fix this issue, make sure your object is editable mesh, and not editable poly.

    Also, ensure the .fbx setting are setup as follows when exporting:
    correct export.JPG after this, come back to unity and your model will look correct (just make sure your unity's import settings don't have dropdown on "calculate normals" but indeed "import normals" (just to avoid any confusion for you newbies :)

    Here is the result:
    nail 2 flipped.JPG
    BrandyStarbrite likes this.
  2. BrandyStarbrite


    Aug 4, 2013
    Yippee! Thanks alot.
    This will come in handy. Especially for max users. :)
    IgorAherne likes this.
  3. DoomCraft


    Jun 11, 2017
    One thing I noticed with 3DS Max 2013, there is a bug that flips the normals. If you have a mesh, select Editable Mesh --> Show Normals On, Normals: Flip. Take a look at those as they do not reflect it in Max until you export to FBX or import in Unity.