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Aliasing in Image Editor
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Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Intel(R) HD Graphics 630 Intel 4.5.0 - Build 27.20.100.9126

Blender Version
Broken: version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: rB0f45cab862b8
Worked: (newest version of Blender that worked as expected)

Short description of error
Rendered image shows with aliasing when i choose scale 1:1 via menu or numpad 1, but always perfectly when i set zoom by mouswheel. On the picture left side is Blender Image Editor, right side - same image, opened in XnViewer

Exact steps for others to reproduce the error
Set scale in Image Editor to 100% by choose 1:1 in Fractional zoom submenu
It works with any image

Event Timeline

Alaska (Alaska) changed the task status from Needs Triage to Needs Information from User.Jan 12 2021, 11:07 PM
Alaska (Alaska) added a subscriber: Alaska (Alaska).

It looks like you may be experiencing the same issue as T83529: Horizontal stripe artifacts in image editor

It looks like you may be experiencing the same issue as T83529: Horizontal stripe artifacts in image editor

You are right, all symptoms are similar