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Changes made using TextureImporter.SetPlatformTextureSettings are not properly saved and do not appear in the Inspector preview

Asset - Importers


How to reproduce:
1. Open the user-submitted Project
2. In the Project Window click on the "Test Sprite" - observe the Override and Max Size settings
3. Go to "Assets" -> "Set Importer Settings"
4. Click on the "Editor" folder and click on the "Test Sprite" again
5. Observe the now changed Override settings and the preview
6. Save the Project, close it and reopen it
7. Observe the "Test Sprite" settings again

Expected result: The new settings are properly saved and appear correctly in the Inspector preview
Actual result: The settings are never properly saved (checking the .meta file shows the old settings), the Inspector preview also shows the old settings

Reproduced in: 2018.2.0b10, 2018.1.7f1, 2017.4.6f1, 2017.2.3p2, 2017.1.4p2
Couldn't test in: 2018.3.0a3

  1. Response avatar

    Resolution Note (2018.3.X):

    Whenever settings get changed on an AssetImporter, it is necessary to call AssetDatabase.ImportAsset to make sure the AssetDatabase see the changes.
    The best way to do it is the following:

    public void ChangeImportSettings(string path)
    var importer = AssetImporter.GetAtPath(path);

    // change some settings on the importer

    // Use this method in case you are using a cache server and want to make sure it is updated with the new settings.
    // Reimport the asset so it is up-to-date with the previous changes.

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