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Anti-Aliasing possibly making viewport buggy
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System Information
Operating system: Darwin-19.3.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 560X OpenGL Engine ATI Technologies Inc. 4.1 ATI-3.5.5

Blender Version
Broken: version: 2.83 (sub 14), branch: master, commit date: 2020-04-23 08:25, hash: rB8dedbb174783
Worked: (newest version of Blender that worked as expected)

Short description of error
As you can see on the screenshots, when I activate Anti-Aliasing on the Viewport the Edit Mode gets very weird.

Exact steps for others to reproduce the error
Activate and Deactivate anti-aliasing and see the effect on Edit Mode.

Event Timeline

All 3 have AMD & Mac in common.
@Germano Cavalcante (mano-wii) Can you test on your AMD (windows)?

Ankit Meel (ankitm) changed the task status from Needs Triage to Confirmed.Apr 25 2020, 4:59 PM
Ankit Meel (ankitm) triaged this task as High priority.

I can confirm this issue on iMac with this configuration:

Operating system: macOS 10.13.6
Graphics card: AMD Radeon HD 6970M

Blender Version

Broken: Blender 2.83 (sub 15) date: 2020-04-25 17:40, hash: f418eddf8e1c & Blender-2.90 - 8d8414cd21a4

Worked: Blender 2.83 (sub 13), branch: master, commit date: 2020-04-21 17:59, hash: 13e3a1c53222

Can any of you post their system-info.txt (from help menu) ? thanks.

Clément Foucault (fclem) changed the task status from Confirmed to Needs Information from User.Apr 26 2020, 11:50 AM

I attempted to fix this in rB05b94c9c5457

Can anyone test and report back?

Fixed, at least for me.

Clément Foucault (fclem) claimed this task.

Feel free to reopen if anyone experience it again.

Perhaps it's a stupid question, I'm new relatively in Blender, how can I downloaded the Blender fixed revision to test it?

I have the same question. I couldn't find a newer blender.

Ok, we will wait 😉