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Votes

1

Found in

2021.3.34f1

2022.3.17f1

2023.2.4f1

2023.3.0b1

Issue ID

UUM-60196

Regression

No

Pixelation distortion occurs when using a Non-Power Of Two (NPOT) dimension sprites

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Reproduction steps:
1. Open the attached project “PixelProject”
2. Open the “Assets/IN-40632_Assets/Scenes/SampleScene.unity” scene
3. Build And Run on Android
4. Observe the Image(i.e. on top) on the app’s screen

Expected result: The distance between each pixel in the image is consistent
Actual result: The pixels are distorted (uneven gaps in the sprites)

Reproducible with: 2021.3.34f1, 2022.3.17f1, 2023.2.4f1, 2023.3.0b1

Reproducible with these devices:
VLNQA00518 - Google Pixel 4 (Pixel 4), CPU: Snapdragon 855 SM8150, GPU: Adreno 640, OS: 12
VLNQA00414 - Galaxy Note10+ 5G (SM-N976V), CPU: Snapdragon 855 SM8150, GPU: Adreno 640, OS: 9
VLNQA00278 - Xiaomi Redmi Note 7 (Redmi Note 7), CPU: Snapdragon 660, GPU: Adreno 512, OS: 9.0.0
VLNQA00139 - Vivo Xplay6 (vivo Xplay6), CPU: Snapdragon 820 MSM8996, GPU: Adreno 530, OS: 7.1.1
VLNQA00132 - Xiaomi Mi 5s (MI 5s), CPU: Snapdragon 820 MSM8996, GPU: Adreno 530, OS: 6.0.1
VLNQA00494 - iPhone 14 Pro Max, 16.3.1 iOS
VLNQA00358 - iPhone 12, 14.1 iOS

Not Reproducible with these devices:
VLNQA00392 - iPad (9th generation), 15.0 iOS
VLNQA00310 - iPad Pro 12.9", 13.4.1 iOS

Testing environment: macOS(Intel) 14.2.1

Notes:
1. Setting the texture atlas to use Bilinear filtering resolves the pixel swimming but blurs the sprite, which is problematic because the game uses pixel art.
2. The issue can be resolved by saving the sprite as a 256x256 sprite (with some padding) and then using borders in the sprite editor to get back to what is needed. Unfortunately, although this clears up the pixel swimming, colliders set to the sprite size are misaligned (and make authoring sprites more complex).

  1. Resolution Note:

    Unity recommends using power-of-two (POT) textures for sprites. Non power-of-two (NPOT) textures will produce visual aliasing artifacts (reduced by using linear texture sampling, but not entirely resolving the artifacts).

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