Artifacts in solid view #74790

New Issue

Georg K · 2020-03-15T21:12:05+01:00

Georg K commented

2020-03-15 21:12:05 +01:00

System Information
Operating system: Linux-5.4.24-1-MANJARO-x86_64-with-glibc2.29 64 Bits
Graphics card: AMD VERDE (DRM 2.50.0, 5.4.24-1-MANJARO, LLVM 9.0.1) X.Org 4.5 (Core Profile) Mesa 19.3.5

Blender Version
Broken: version: 2.83 (sub 9), branch: master (modified), commit date: 2020-03-15 18:43, hash: 22925d0dd3 (Master is modified because I had to revert commit 56d6666689 because of https://developer.blender.org/T74024 it also show artifacts without the revert), blender-2.83-a210b8297f5a-linux64
Worked: 2.82 official, version: 2.82 (sub 6), branch: master, commit date: 2020-01-14 15:55, hash: ba5bbf14f9, 2.83 56d6666689

Short description of error
There are artifacts on the geometry in solid shading (can't see them in the other modes). On a different system with intel skylake with integrated graphics, the artifacts are not visible.

Exact steps for others to reproduce the error
Open blender, rotate camera around default cube until you see the artifacts (in the default view position it is not very visible. It helps to move closer to the cube and to look at the brighter areas)

**System Information** Operating system: Linux-5.4.24-1-MANJARO-x86_64-with-glibc2.29 64 Bits Graphics card: AMD VERDE (DRM 2.50.0, 5.4.24-1-MANJARO, LLVM 9.0.1) X.Org 4.5 (Core Profile) Mesa 19.3.5 **Blender Version** Broken: version: 2.83 (sub 9), branch: master (modified), commit date: 2020-03-15 18:43, hash: `22925d0dd3` (Master is modified because I had to revert commit 56d6666689f7 because of https://developer.blender.org/T74024 it also show artifacts without the revert), blender-2.83-a210b8297f5a-linux64 Worked: 2.82 official, version: 2.82 (sub 6), branch: master, commit date: 2020-01-14 15:55, hash: `ba5bbf14f9`, 2.83 56d6666689f7 **Short description of error** There are artifacts on the geometry in solid shading (can't see them in the other modes). On a different system with intel skylake with integrated graphics, the artifacts are not visible. ![SolidViewArtifacts.jpg](https://archive.blender.org/developer/F8408350/SolidViewArtifacts.jpg) **Exact steps for others to reproduce the error** Open blender, rotate camera around default cube until you see the artifacts (in the default view position it is not very visible. It helps to move closer to the cube and to look at the brighter areas)

Georg K commented

2020-03-15 21:12:05 +01:00

Added subscriber: @georgK

Jeroen Bakker commented

2020-03-16 07:32:27 +01:00

Added subscriber: @Jeroen-Bakker

Jeroen Bakker commented

2020-03-16 07:32:27 +01:00

As mentioned in the ticket this could be related to #74024 (Faces missing, weird faces added)
Biggest challenge of this ticket is that we cannot reproduce this with the hardware we have. But as it has worked for some releases.
It would help us to perform a git bisect or check with renderdoc on this issue; would that be something you could help us with?

As mentioned in the ticket this could be related to #74024 (Faces missing, weird faces added) Biggest challenge of this ticket is that we cannot reproduce this with the hardware we have. But as it has worked for some releases. It would help us to perform a git bisect or check with renderdoc on this issue; would that be something you could help us with?

Georg K commented

2020-03-16 14:41:22 +01:00

Found it! This commit also caused the crash opening the Spring splash scene https://developer.blender.org/T74791

c476c36e40 is the first bad commit
commit c476c36e40
Author: Clément Foucault foucault.clem@gmail.com
Date: Wed Mar 11 17:07:43 2020 +0100

  Workbench Simplification Refactor
  
  This patch is (almost) a complete rewrite of workbench engine.
  The features remain unchanged but the code quality is greatly improved.
  Hair shading is brighter but also more correct.
  
  This also introduce the concept of `DRWShaderLibrary` to make a simple
  include system inside the GLSL files.
  
  Differential Revision: https://developer.blender.org/D7060

Found it! This commit also caused the crash opening the Spring splash scene https://developer.blender.org/T74791 c476c36e400883d929a7149def8dcb6ad6157a86 is the first bad commit commit c476c36e400883d929a7149def8dcb6ad6157a86 Author: Clément Foucault <foucault.clem@gmail.com> Date: Wed Mar 11 17:07:43 2020 +0100 ``` Workbench Simplification Refactor This patch is (almost) a complete rewrite of workbench engine. The features remain unchanged but the code quality is greatly improved. Hair shading is brighter but also more correct. This also introduce the concept of `DRWShaderLibrary` to make a simple include system inside the GLSL files. Differential Revision: https://developer.blender.org/D7060

Jeroen Bakker commented

2020-03-16 16:08:09 +01:00

Added subscriber: @fclem

Jeroen Bakker commented

2020-03-16 16:08:09 +01:00

@georgK Thanks, That is a big patch. @fclem do you have an idea what could corrupt this on old AMD cards?

Asher commented

2020-03-16 18:39:41 +01:00

Added subscriber: @ThatAsherGuy

Asher commented

2020-03-16 18:39:41 +01:00

I've noticed similar artifacts in wireframe view on my system (Win 10, 2600X, RTX 2060 442.59), so this might not be hardware/driver specific.

Georg K commented

2020-03-16 19:49:32 +01:00

No artifacts in wireframe view here.

Clément Foucault commented

2020-03-17 13:36:28 +01:00

@georgK we need a bit more testing: does that happen with all shading mode? color mode? with outline enabled? with cavity enabled? etc...

Is there any configuration (which is not Xray or wireframe) that works?

@georgK we need a bit more testing: does that happen with all shading mode? color mode? with outline enabled? with cavity enabled? etc... Is there any configuration (which is not Xray or wireframe) that works?

Georg K commented

2020-03-17 15:39:02 +01:00

There is a configuration that works: Specular Lighting: off removes the artifacts. There is also a slight improvement by setting Antialiasing >= 5Samples as long as there is no interaction.
Also, setting Specular Lighting to "off" and deactivating "Load UI" in the file view allows to load the Spring splash scene https://developer.blender.org/T74791 without crashing.

tested cases in detail:
Viewport Antialiasing off/Single Pass Antialiasing: artifacts in both cases
Viewport Antialiasing 5Samples - 32Samples : artifacts in all cases,
But: with higher sample count, artifacts vanish if the view is not moved (looks like blurring). Once the camera is moved, they become visible again and flicker as long as the viewport is interacted with. The pattern also changes if a different tool is selected or while the cursor is moved over the navigation gizmo.

Overlay Smooth Wires on/off: artifacts in both cases
Edit Mode Smooth Wires on/off: artifacts in both cases (does not seem to have any effect on wire smoothness in edit mode in contrast to Overlay Smooth Wires. Edit mode wires always seem smooth)

Shading mode?
wire : -
solid : artifacts
material: -
rendered: -

Solid shading - Viewport shading: Color=Material/Object/Vertex/Single/Random/Texture: artifacts in all cases

Background Theme/World/Viewport: artifacts in all cases

Options:
Shadow on/off: artifacts in both cases
Cavity on/off: artifacts in both cases
Outline on/off: artifacts in both cases
Specular Lighting on: artifacts
Specular Lighting off: no artifacts

There is a configuration that works: Specular Lighting: off removes the artifacts. There is also a slight improvement by setting Antialiasing >= 5Samples as long as there is no interaction. Also, setting Specular Lighting to "off" and deactivating "Load UI" in the file view allows to load the Spring splash scene https://developer.blender.org/T74791 without crashing. tested cases in detail: Viewport Antialiasing off/Single Pass Antialiasing: artifacts in both cases Viewport Antialiasing 5Samples - 32Samples : artifacts in all cases, **But**: with higher sample count, artifacts vanish if the view is not moved (looks like blurring). Once the camera is moved, they become visible again and flicker as long as the viewport is interacted with. The pattern also changes if a different tool is selected or while the cursor is moved over the navigation gizmo. Overlay Smooth Wires on/off: artifacts in both cases Edit Mode Smooth Wires on/off: artifacts in both cases (does not seem to have any effect on wire smoothness in edit mode in contrast to Overlay Smooth Wires. Edit mode wires always seem smooth) Shading mode? wire : - solid : artifacts material: - rendered: - Solid shading - Viewport shading: Color=Material/Object/Vertex/Single/Random/Texture: artifacts in all cases Background Theme/World/Viewport: artifacts in all cases Options: Shadow on/off: artifacts in both cases Cavity on/off: artifacts in both cases Outline on/off: artifacts in both cases Specular Lighting on: artifacts Specular Lighting off: **no artifacts**

Germano Cavalcante commented

2020-03-24 14:36:26 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Georg K commented

2020-04-15 18:44:16 +02:00

Retested 22925d0dd3 after mesa upgrade from 19.3.5-1 to 20.0.4-1 and the artifacts are gone.

Retested 22925d0dd3 after mesa upgrade from 19.3.5-1 to 20.0.4-1 and the artifacts are gone.

Georg K commented

2020-04-15 18:44:59 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Georg K closed this issue

2020-04-15 18:44:59 +02:00

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Artifacts in solid view #74790