AnyPortrait > Forum > Bugs or Suggestions

Setting Bone value to “-1” cause Bake invisibility problem

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• March 1, 2026 at 11:08 am #1583
  DryreL

  Hi RainyRizzle,

  I encountered a problem while making an animation.

  Here’s an animation scene with Arm mesh, a bone attached.

  

  Default Scale: +1

  When creating the animation, I set the Scale Transform value to “-1” because I wanted the character’s arm to be symmetrical.

  

  The scale value was successfully updated in AnyPortrait editor, but…

  

  THE PROBLEM IS: when I use Bake, Mesh, which has a value of “-1”, becomes invisible in-game.

  Preview in Play mode:

  

  AnyPortrait 1.6.2

  Unity 6000.3.9f1 LTS

  Thanks in advance!

  March 1, 2026 at 11:27 am #1584
  RainyRizzle

  Hello!
  If the sign of a bone’s size is reversed, the front and back faces of some parts of the mesh may be reversed.
  By default, AnyPortrait materials only render the front face, so if the back face is rendered, some parts of the mesh will be invisible.

  In this case, the most convenient way is to change the options so that both sides of the mesh are rendered.
  https://rainyrizzle.github.io/en/AdvancedManual/AD_2SidedMesh.html

  Depending on your rigging method, changing the Bake option may also resolve the issue.
  https://rainyrizzle.github.io/en/AdvancedManual/AD_ReversedRiggedMesh.html

  Please refer to the manual above and try the solutions.
  If the problem persists, please leave a comment again!
  Thank you.

  March 1, 2026 at 1:37 pm #1585
  DryreL

  Thanks! Enabling 2-Sides solved my issue 🙂

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