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Fixed in 5.5.0



Found in


Issue ID




ETC1 + Alpha not working on UI Images when the used sprite is with 'Packing Tag' set



Steps to reproduce:

1. Open the attached project
2. Make sure that:
Editor mode is set to Android
Texture 'bar_iso_energy' is set to Sprite, has a 'Packing Tag' set
and has 'Compress using ETC1 (split alpha channel)' enabled.
3. Play the scene
4. Notice the lower left image (UI Image) does not have alpha channel applied, while the one in the middle (Sprite renderer) does have.
5. Stop the scene
6. Delete the 'Packing Tag' of the 'bar_iso_energy' sprite
7. Play the scene again, notice both have alpha channel as expected

Comments (9)

  1. wildfire2016

    Jun 17, 2016 11:14


  2. BartNT

    Apr 12, 2016 15:23

    I have always ETC2 output for sprites (for both: in atlases or not)

  3. BartNT

    Apr 12, 2016 15:18

    It is crucial functionality for android 2D games and still not working in Unity 5.3.4p2 :/
    Please fix this issue.

  4. xjqxzyr

    Feb 14, 2016 07:41

    Can this can be fixed in the next release version?

  5. TobyKaos

    Jan 25, 2016 09:31

    Yes, we must create several APK if we us Atlas packing with sprites variant. I must create a ETC2, a PVRTC, a ATC apk files.

    I prefer create one ETC1 + alpha and one ETC2.

    Please fix this issue for 2D game developer :)

  6. xjqxzyr

    Jan 24, 2016 10:23

    please fix this problem as soon as possible

  7. xjqxzyr

    Jan 24, 2016 10:23

    please fix this problem as soon as possible

  8. TobyKaos

    Jan 22, 2016 15:11

    Yes, +1 here. Maybe a work around can be explain? Thank you

  9. davecazz

    Nov 22, 2015 20:08

    not having this is making android development incredibly difficult, especially for ui heavy games.

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