Sprite Packer generates artifacts at Sprite Atlas when packing a 1x1 texture

Unity: 2D

As Designed

2023.2.X

2023.1.X

2022.3.X

2021.3.X

The transparent 'artifacts' are just pixel dilation to actually prevent artefacts when rendering sprites. In the atlas texture below, the semi-transparent pixels are essentially dilated pixels (ie pixels extended along the edge of sprite). If one wants to disable this, use Alpha Dilation option in SpriteAtlas.

How to reproduce:
1. Open the user-attached project “1576081-URP Sprite Import 2021”
2. Select the “New Sprite Atlas” Asset
3. In the Inspector, under the field “Object for Packing” drag and drop “friends_cell_background_light_1x1_broken” Asset
4. Click “Pack Preview”
5. Observe the Sprite Atlas preview

Expected result: The packed Sprite Atlas has a plain color with no artifacts
Actual result: The packed Sprite Atlas has transparent artifacts

Reproducible with: 2021.3.26f1, 2022.3.1f1, 2023.1.0b16, 2023.2.0a18

Reproducible on: Windows 11 Pro, macOS Ventura 13.4 (M1)

Sprite Packer generates artifacts at Sprite Atlas when packing a 1x1 texture

Unity: 2D

As Designed

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Sprite Packer generates artifacts at Sprite Atlas when packing a 1x1 texture

Unity: 2D

Statuses

As Designed

Resolution Notes

Description

Prioritise and Follow this issue

Have a workaround or additional info about this issue?