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Fixed
Won't Fix in 2020.3.X
Fixed in 2021.2.0a18
Votes
0
Found in
2020.3.41f1
Issue ID
UUM-18211
Regression
No
Texture2D creates DXT texture when the unacceptable texture size is given.
Reproduction steps:
1. Create a new project
2. Import the attached Script (DXTTest.cs)
3. Run Script (Menu Entry > Bug Test > DXT size)
4. Observe the Console window
Expected result: Exception for wrong “DXT” texture resolution thrown into Console window
Actual result: Texture “successfully created”
Reproducible with: 2020.3.41f1, 2021.1.28f1, 2021.2.0a17
Not reproducible with: 2021.2.0a18, 2021.2.19f1, 2021.3.12f1, 2022.1.21f1, 2022.2.0b13, 2023.1.0a16
Reproducible on: intel MacOS 11.6.8
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Resolution Note (2020.3.X):
This change was added in Unity 2021.2 (see https://unity.com/releases/editor/whats-new/2021.2.0: "Restricted DXT/BCn texture compression to textures with multiple-of-four width and height. This ensures the same behavior as the Texture Importer and requires multiple-of-four dimensions when compressing."). However, this will not be backported to 2020.3 since it is a change that may potentially break existing (and fully functional) user projects. If there are particular bugs with non-multiple-of-four BC-compressed textures in Unity 2020.3 (for particular compression formats), these should be handled separately by fixing them instead of by adding restrictions.
Note: in Unity 2020.3, DXT-textures with non-multiple-of-four sizes are stored in compressed form, but uploaded to GPU in uncompressed form. This behind-your-back-decompression has been dropped in Unity 2021.2 in favor of simply not allowing this compression to begin with.