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Can't see wireframe (vertex, selected components) through semi-transparent object
Confirmed, NormalPublicKNOWN ISSUE


System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.19

Blender Version
Broken: version: 2.83 (sub 10), branch: master, commit date: 2020-03-22 20:46, hash: rB0c571db4add3
Worked: c26f470cfeea is last I have by hand

Short description of error
In the viewport, you can't see wireframe (vertex, selected components) through a semi-transparent object

Exact steps for others to reproduce the error

1 - Create 2 objects one behind the other
2 - Make front object semi-transparent (via Object properties > Viewport Display > Color > Alpha
3 - Select the second object in Edit mode

Event Timeline

Richard Antalik (ISS) changed the task status from Needs Triage to Confirmed.Thu, Mar 26, 4:07 PM
Richard Antalik (ISS) updated the task description. (Show Details)

Using git bisect I narrowed down the problem commit to hash c476c36e400883d929a7149def8dcb6ad6157a86 which unfortunately is quite large.

I thought the issue would lie in overlay_edit_mesh.c however this file was not changed in the commit.

Clément Foucault (fclem) changed the subtype of this task from "Report" to "Known Issue".Fri, Mar 27, 3:13 PM

Unfortunately this is a side effect of the refactor which streamlined a few things. But this meant having transparent object being opaque to overlays in solid mode.
This was a design decision.

Note that this refactor brought other improvement like the possibility of having thansparent objects using in-front property.