Issue in viewport/shading mode on amd card #83298

New Issue

Alex · 2020-12-01T21:29:47+01:00

Alex commented

2020-12-01 21:29:47 +01:00

System Information
Operating system: Windows-10-10.0.17763-SP0 64 Bits
Graphics card: Radeon RX 580 Series ATI Technologies Inc. 4.5.14736 Core Profile Context 20.8.3 27.20.12027.1001

Blender Version
Broken: version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: 0f45cab862
Worked: (newest version of Blender that worked as expected)

Short description of error
Mesh in viewport becomes glitchy an pixelated, when using amd videoadapter in scene viewport shading color set to material or texture. And any other color when x-ray is toggled in viewport.
I figured out that it happen when any object in scene have more than single material slot, and any of that slots (even unused) have alpha transparency less than 1 in color of viewport display in material.
This issue force me to use old version of blender.

Exact steps for others to reproduce the error

route1

Open startup file.
Create any object.
Assign to it default material.
Change in material viewport display color alpha value less than 1.
Add another material slot.
Viewport gets weird at this point.

route2

Open startup file.
Create two objects.
Assign to any object default material.
Change in material viewport display color alpha value less than 1.
Viewport weird at this point.

The file with this issue appearing after opening (tested on 2 different amd systems):

bak-report-amd-viewport.blend

**System Information** Operating system: Windows-10-10.0.17763-SP0 64 Bits Graphics card: Radeon RX 580 Series ATI Technologies Inc. 4.5.14736 Core Profile Context 20.8.3 27.20.12027.1001 **Blender Version** Broken: version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: `0f45cab862` Worked: (newest version of Blender that worked as expected) **Short description of error** Mesh in viewport becomes glitchy an pixelated, when using amd videoadapter in scene viewport shading color set to material or texture. And any other color when x-ray is toggled in viewport. I figured out that it happen when any object in scene have more than single material slot, and any of that slots (even unused) have alpha transparency less than 1 in color of viewport display in material. *This issue force me to use old version of blender.* **Exact steps for others to reproduce the error** **route1** - Open startup file. - Create any object. - Assign to it default material. - Change in material viewport display color alpha value less than 1. - Add another material slot. - Viewport gets weird at this point. **route2** - Open startup file. - Create two objects. - Assign to any object default material. - Change in material viewport display color alpha value less than 1. - Viewport weird at this point. ``` The file with this issue appearing after opening (tested on 2 different amd systems): ``` [bak-report-amd-viewport.blend](https://archive.blender.org/developer/F9421276/bak-report-amd-viewport.blend) ![bak-report-amd-viewport.jpg](https://archive.blender.org/developer/F9421290/bak-report-amd-viewport.jpg)

Alex commented

2020-12-01 21:29:47 +01:00

Added subscriber: @Homos

Eugene Du commented

2020-12-02 10:18:28 +01:00

Added subscriber: @APEC

Eugene Du commented

2020-12-02 10:18:28 +01:00

seems the same report
https://developer.blender.org/T83022

seems the same report https://developer.blender.org/T83022

Ben Thery commented

2020-12-03 14:22:57 +01:00

Added subscriber: @oxben

Ben Thery commented

2020-12-03 14:22:57 +01:00

I confirm same issue as #83022 and #83039

Germano Cavalcante commented

2020-12-07 19:51:15 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-12-07 19:51:15 +01:00

This is a problem with the AMD driver.
It will probably be fixed in later versions (which comes with automatic windows updates).
If this does not happen anytime soon, developers can work on a workaround in Blender itself.

This is a problem with the AMD driver. It will probably be fixed in later versions (which comes with automatic windows updates). If this does not happen anytime soon, developers can work on a workaround in Blender itself.

Germano Cavalcante commented

2020-12-07 19:51:24 +01:00

Closed as duplicate of #83022

Germano Cavalcante closed this issue

2020-12-07 19:51:24 +01:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Issue in viewport/shading mode on amd card #83298