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UV Editor - View Tab > Overlay > Display as Outline : not work on macOS
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System Information
Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon R9 M370X OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.21

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: rB375c7dc4caf4
Worked: (optional)

Short description of error
Sorry for my bad English,

  • in Uv Editor, the Overlay display as Outline not work and it is really difficult to see the uv islands.

Maybe it depends on macOS Mojave, but in Blender 2.79 is working fine...

  • Also, the "Outline Width" in Preference > Theme > 3D View does nothing.


Exact steps for others to reproduce the error
Enter in Uv Editor and watch the Uv map

Event Timeline

Could you check on an experimental build ?
It added an option of UV opacity too.
Also upload a simple blend file like that screenshot. On default scene, visibility isn't an issue.

Ankit (ankitm) changed the task status from Needs Triage to Needs Information from User.Sun, May 17, 11:46 AM

I try 2.83 and 2.90, both with default setting.

The "Overlay Opacity" is active (1), but the black outline on UV edge not display

Maybe is a issue relative to my machine?
The "Outline Width" in "Preference > Theme > 3D View" only works if I open blender at low resolution.

Ankit (ankitm) changed the task status from Needs Information from User to Needs Triage.Sun, May 17, 3:16 PM

Both working fine here

System Information
Operating system: Linux-5.5.13-200.fc31.x86_64-x86_64-with-fedora-31-Thirty_One 64 Bits
Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.64
version: 2.90 (sub 2), branch: master, commit date: 2020-05-17 18:22, hash: rB5c5a638b571a

Yes,...I imagined it
macOS is not the best friend for Blender!
What a pity ...maybe I should switch to Linux
...or go back to 2.79, where the "overlay" in UV editor seems to work well.


@Philipp Oeser (lichtwerk) could you add a photo? I'm unsure about what to compare it with.

Yep, of course!

and system info, if needed


Campbell Barton (campbellbarton) renamed this task from UV Editor - View Tab > Overlay > Display as Outline : not work to UV Editor - View Tab > Overlay > Display as Outline : not work on macOS.Mon, May 18, 12:55 PM
Ankit (ankitm) changed the task status from Needs Triage to Confirmed.Tue, May 19, 10:37 AM
Ankit (ankitm) added a project: User Interface.

This is a known issue. The outlines use glLineWidth width what isn't supported by Mac. A short term solution would be to re-implement the UV line drawing to use faces. A longer term solution is the migration of the UV Image editor to the draw manager where we can use the overlay engine to render lines. Due to the Faster Animation Playback this project slips D6093: [WIP] DrawManager: Image/UV editor Drawing.