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Texture2D.alphaIsTransparency API is editor-only but lives in UnityEngine.dll



-e: Using Texture2D.alphaIsTransparency in a script causes the build to fail with the following error:

error CS1061: Type `UnityEngine.Texture2D' does not contain a definition for `alphaIsTransparency' and no extension method `alphaIsTransparency' of type `UnityEngine.Texture2D' could be found (are you missing a using directive or an assembly reference?)

* Open attached example project.
* Go to File > Build Settings
* Select PC, Mac & Linux Standalone
* Select Target Platform "Windows x86"
* Press Build
* NOTICE the build fails.

Using Texture2D.alphaIsTransparency should not break a build.
If this is intended to be an editor-only method, consider moving it in to UnityEditor.dll.

Update: This setting is available only in the Editor scripts. Note that changing this setting will have no effect; it must be enabled in TextureImporter instead.

Comments (14)

  1. tmoneygames

    Dec 07, 2022 07:36

    I'm having the same issue with version 2020.3.42f1 as well. So I can say the bug is still there in this version as well.

  2. daniel_martins

    Aug 09, 2018 16:09

    I tested this on Unity3D version 2018.2.2f1 and the following error appears: error CS0117: 'UnityEngine.Texture2D' does not contain a definition for 'alphaIsTransparency'.

  3. Adherbal

    Jan 09, 2018 17:29

    Same problem. Hardware cursors won't work correctly using dynamically-loaded PNG textures because I can't set alphaIsTranparency in the game build, while it works fine in editor.

  4. Loden_Heathen

    Jan 02, 2018 16:02

    I can confirm the issue is still with us in 2017.3

  5. fatboynotslim

    Dec 20, 2017 16:53

    I am using texture arrays. At first run i build two different texture arrays; one for opaque textures and one for transparent textures. This works perfectly in the editor.

    However when I try to compile to build i get error 1061' same as the others.

    Please fix this as I need to use it at runtime to determine if a texture is transparent or not! Otherwise I don't know which texture array to put it in.

    NB I *can* do a workaround by naming all trans texures with a leading underscore and checking the name but this is (a) Slower than checking a alfa value (b) Kludgey (c) Prone to errors - i might accidentally underscore a texture that is not trans, or not underscore a texture that is.

    Please fix!

  6. toqueteos

    Nov 29, 2017 22:59

    Still an issue, I'm using Unity 2017.2.0f3 on Windows 10

  7. Ghosthowl

    May 29, 2017 23:16

    This issue still exists for me in Unity 5.6.1f1

  8. MATHIS-Nicolas

    May 13, 2017 14:34

    In Unity 5.6 I have the same bug.

  9. Hullabu

    Jan 04, 2017 14:04

    This bug still exists in Unity 5.5.0p3. Dynamically-created textures has artifacts on the edges. It a problem and it must be fixed.

  10. ArtyBrest

    Jan 04, 2017 14:03

    Reproduced in v5.5.0p3.

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