Mesh Noise Glitch in X-Ray Mode

Question

Blender Version: 2.91 (also 2.83)
GPU: Radeon RX 590 (with and without updated drivers)

Edit:

I stumbled upon the problem in another context which lead me to a way to recreate the glitch in a clean file:

Open Default File (named General)
Go to the material of the default cube (in Solid Mode)
Under Viewport Display go to Color and set the Alpha to anything else than 1
Add a new material

This creates the glitchy mesh seen in the image below.

Original Problem:

My viewport shows weird noise when I toggle x-ray mode only in solid view.

I had In Front (under Object Properties>Viewport Display) enabled for my mesh and after a lot of searching I found out that I can toggle the glitch by disabling that.

I cannot seem to recreate the glitch in a clean file though and I'm a bit afraid that something is broken in my file.

Things I tried before the "In Front" toggling:

deleting all vertex groups, materials, modifiers and all other objects in the file
switched from smooth to flat shading
cleared all marked edges
disabled auto-smooth
disabled all addons (and later used a clean install)

Changing the workspace resets the view but the glitch returns on toggling x-ray view.

At least when I export the mesh as an FBX file that seems to be glitch-free. Though that way I lose all my vertex groups.

Any ideas what is happening here?

Possibly a gpu problem, what is your gpu? Are your your drivers recently updated? — Timaroberts, Dec 28 '20 at 23:18
I have a Radeon RX 590. After updating to latest drivers the glitch persists. I found a way to recreate the problem in a clean file though which involves the alpha channel of the material's viewport display setting. See my edit for detailed instructions. — Rayzorblade23, Dec 29 '20 at 00:09
This is likely part of the same AMD issue that has been affecting many users as of late, although some instances appear to look different, seems that the solution is the same... — Timaroberts, Dec 29 '20 at 00:11
Does this answer your question? AMD GPU Material in "material preview mode" and "rendered mode", is entirely gray as background. Only outline is displayed — Timaroberts, Dec 29 '20 at 00:11
https://blender.stackexchange.com/questions/204044/viewports-broken-on-rx-580 — Timaroberts, Dec 29 '20 at 00:12
Thank you for your help, that wasn't actually it but it lead me to the Bug Ticket that describes my problem exactly. (https://developer.blender.org/T83022) It's as of yet unresolved but supposedly indeed a GPU driver issue. Should I delete my question? — Rayzorblade23, Dec 29 '20 at 00:26
No, don't delete the question. Write an answer with the info you found so far. Other users with similar issues will benefit from it. — susu, Dec 29 '20 at 00:28
Thanks, will do. I was just unsure since the guidelines say not to ask about possible bugs. — Rayzorblade23, Dec 29 '20 at 00:32

score 1 · Answer 1 · answered Dec 29 '20 at 00:36

1

The glitch appears to be a driver issue with Radeon GPUs, especially with recent Blender versions. It is, as of yet, unresolved.

Link to the Bug Ticket:
https://developer.blender.org/T83022

answered Dec 29 '20 at 00:36

Rayzorblade23

21
5

Mesh Noise Glitch in X-Ray Mode

1 Answers1