Face retouching can make skin look smoother, eyes look brighter and teeth look more white.

It's is only visible in the simulator window - not the main view.

To add retouching:

  1. Insert a Face Mesh.
  2. Add a new Material to the face mesh.
  3. Select the new Material.
  4. Select Retouching Material from the Shader Type dropdown in the Inspector panel.
  5. Adjust the sliders to brighten eyes, whiten teeth and smooth skin.

You can also follow this video tutorial.