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TextMeshPro underlay does not render correctly when loading the font and enabling underlay in code

Package: TextMeshPro


How to reproduce:
1. Open the attached project
2. Click Play
3. Observe the Game View

Expected result: You can see the underlay completely
Actual result: The underlay is slightly cut off

Reproducible with: 1.4.1 - 3.0.4 (2018.4.33f1, 2019.4.23f1, 2020.3.4f1, 2021.1.3f1, 2021.2.0a13)

1. To see expected results select the Text in the Scene Hierarchy and in the Inspector expand the underlay tab

  1. Resolution Note:

    This behavior is by design in the sense that the text object has no idea the material properties have been changed. Since some material properties like Outline or Underlay may require an update of the text geometry to make room for the Outline or Shadow, the text object needs to be notified of such change which would require an update of the text geometry and mesh padding.

    The TMP_Text.UpdateMeshPadding() function should be used after the material properties have been changed to notify the text object that it should update the mesh padding.

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