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Fixed in 2020.1.X

Planned for 2019.4.X



Found in





Issue ID




Crash when creating a new Texture2D with a resolution greater or equal to 2048 and the mipCount higher than 1

Graphics - General


How to reproduce:
1. Open the attached project named "Case_1213005"
2. Open the Sample Scene
3. Enter Play mode

Expected result: Editor Enters Play mode and successfully creates a new Texture2D or throws a related error message
Actual result: Editor crashes

Reproducible with: 2019.2.18f1, 2019.3.0f5, 2020.1.0a20
Could not test with: 2017.4.36f1, 2018.4.15f1(Constructor option to set the mipCount was introduced in 2019.2)

- Setting the resolution to 1024x1024 and the mipCount to 12 produces the following error:
Assertion failed on expression: 'mipCount >= -1 && mipCount <= fullMipChainCount'
UnityEngine.Texture2D:.ctor(Int32, Int32, GraphicsFormat, Int32, TextureCreationFlags)
NewBehaviourScript:Start() (at Assets/NewBehaviourScript.cs:12)

- The crash can be worked around by passing both the mipcount and TextureCreationFlags.MipChain to the Texture2D constructor.

  1. Response avatar

    Resolution Note (fix version 2020.1):

    Crash is fixed along with an extra error logged if the mipcount passed in is too high.
    Fixed in Unity 2020.2.0a2

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