Grease Pencil Anti-Aliasing Broken on Linux/AMD #114338

New Issue

Dakota-4 · 2023-10-31T19:42:41+01:00

Dakota-4 commented

2023-10-31 19:42:41 +01:00

System Information
Operating system: Linux (Endeavour OS) Kernel - 6.5.8-arch1-1
Graphics card: AMD Radeon RX 7800 XT

Blender Version

Broken:

3.6.4, 21bfc5e7fe, makepkg
3.6.5, cf1e1ed46b, makepkg
4.1.0 Alpha, 9934381733, main

Could not find a working version.

Short description of error

When either a Line Art modifier is applied to a grease pencil object, or a grease pencil stroke is drawn into the environment, if the Grease Pencil Anti-Aliasing Threshold is anything other than 0, severe artifacting occurs.

This issue seems specific to AMD cards, or AMD cards on Linux. I tested using a laptop that has an Intel integrated graphics card, and it worked as expected (picture at the bottom).

Example of lines at 0 anti-aliasing threshold:

Example of lines at any other value:

Image of anti-aliasing working as expected on Linux with Intel Integrated Graphics:

Attached is the blend file in the photo, in a currently broken state.

Exact steps for others to reproduce the error

Create New Blender Scene
Create a Blank Grease Pencil Object
Apply the Line Art Modifier
Ensure Grease Pencil Anti-Aliasing is anything besides 0
The Default cube will show lines that have this issue

**System Information** Operating system: Linux (Endeavour OS) Kernel - 6.5.8-arch1-1 Graphics card: AMD Radeon RX 7800 XT **Blender Version** Broken: - 3.6.4, 21bfc5e7fe3f, makepkg - 3.6.5, cf1e1ed46b7e, makepkg - 4.1.0 Alpha, 9934381733ac, main Could not find a working version. **Short description of error** When either a Line Art modifier is applied to a grease pencil object, or a grease pencil stroke is drawn into the environment, if the Grease Pencil Anti-Aliasing Threshold is anything other than 0, severe artifacting occurs. This issue seems specific to AMD cards, or AMD cards on Linux. I tested using a laptop that has an Intel integrated graphics card, and it worked as expected (picture at the bottom). Example of lines at 0 anti-aliasing threshold: ![image](/attachments/556dc6cc-6a1b-41e9-91ae-94ba96af83b0) Example of lines at any other value: ![image](/attachments/d356f4d8-81c6-4d74-9281-b6ef614051db) Image of anti-aliasing working as expected on Linux with Intel Integrated Graphics: ![image_2023-10-31_14-35-49](/attachments/39946609-024a-4c9a-8bb6-a477d6a97179) Attached is the blend file in the photo, in a currently broken state. **Exact steps for others to reproduce the error** - Create New Blender Scene - Create a Blank Grease Pencil Object - Apply the Line Art Modifier - Ensure Grease Pencil Anti-Aliasing is anything besides 0 - The Default cube will show lines that have this issue ![image](/attachments/7ea26cee-668e-4761-bcd1-2d0ac7bb9a0d)

image.png

489 KiB

image_2023-10-31_14-35-49.png

1.2 MiB

vending-machine.blend

2.9 MiB

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471 KiB

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126 KiB

Dakota-4 added the

labels 2023-10-31 19:42:42 +01:00

Germano Cavalcante added the

Platform

Linux

label 2023-10-31 22:18:09 +01:00

Germano Cavalcante commented

2023-10-31 22:22:47 +01:00

Seems to work fine on:
Operating system: Windows-10-10.0.23575-SP0 64 Bits
Graphics card: Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.6.0 Core Profile Context 23.20.01.04.230725

It appears that this issue might be specific to AMD graphics cards on Linux.

Please double-check if the drivers are up to date.
To upgrade to the latest driver, see here for more information: https://docs.blender.org/manual/en/dev/troubleshooting/gpu/index.html

Seems to work fine on: Operating system: Windows-10-10.0.23575-SP0 64 Bits Graphics card: Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.6.0 Core Profile Context 23.20.01.04.230725 It appears that this issue might be specific to AMD graphics cards on Linux. Please double-check if the drivers are up to date. To upgrade to the latest driver, see here for more information: https://docs.blender.org/manual/en/dev/troubleshooting/gpu/index.html

Dakota-4 commented

2023-10-31 23:22:36 +01:00

I agree that this does seem to be Linux + AMD specific. As far as I can tell, my drivers are as up-to-date as possible. I did a system update to be sure, and everything looks to be up-to-date:

renderer:	'AMD Radeon RX 7800 XT (gfx1101, LLVM 16.0.6, DRM 3.54, 6.5.9-arch2-1)'
vendor:		'AMD'
version:	'4.6 (Core Profile) Mesa 23.2.1-arch1.2'
device type:	'AMD'
backend type:	'OPENGL'

The only "custom" thing I've done is install the opencl-amd and hip-runtime-amd packages to allow me to use Cycles HIP rendering with my GPU

Does Blender require the proprietary drivers be installed for something like this?

I agree that this does seem to be Linux + AMD specific. As far as I can tell, my drivers are as up-to-date as possible. I did a system update to be sure, and everything looks to be up-to-date: ``` renderer: 'AMD Radeon RX 7800 XT (gfx1101, LLVM 16.0.6, DRM 3.54, 6.5.9-arch2-1)' vendor: 'AMD' version: '4.6 (Core Profile) Mesa 23.2.1-arch1.2' device type: 'AMD' backend type: 'OPENGL' ``` The only "custom" thing I've done is install the `opencl-amd` and `hip-runtime-amd` packages to allow me to use Cycles HIP rendering with my GPU Does Blender require the proprietary drivers be installed for something like this?

Pratik Borhade commented

2023-11-02 06:26:44 +01:00

Hi, unable to confirm either with integrated AMD GPU on Windows
Would be helpful if you check with official AMD drivers

Hi, unable to confirm either with integrated AMD GPU on Windows Would be helpful if you check with official AMD drivers

Pratik Borhade added

Status

Needs Information from User

and removed

Status

Needs Triage

labels 2023-11-02 06:26:52 +01:00

Dakota-4 commented

2023-11-02 19:08:41 +01:00

Ill try and get the proprietary drivers installed here soon and see if there is a difference.

Dakota-4 commented

2023-11-07 18:01:19 +01:00

Hi, unable to confirm either with integrated AMD GPU on Windows
Would be helpful if you check with official AMD drivers

The proprietary drivers do not appear to have this problem. Once those were installed, it appears antialiasing works as intended again. Having these drivers installed is really not preferable, however, if I want to use this machine for pretty much anything else. Is this something I should report to an upstream, or is this something that can be fixed on the Blender side?

For anyone who might need it, here are the steps I took for Arch, essentially using this Arch Wiki article:

yay -S amdgpu-pro-oglp lib32-amdgpu-pro-oglp vulkan-amdgpu-pro lib32-vulkan-amdgpu-pro amf-amdgpu-pro
progl blender

> Hi, unable to confirm either with integrated AMD GPU on Windows > Would be helpful if you check with official AMD drivers The proprietary drivers do not appear to have this problem. Once those were installed, it appears antialiasing works as intended again. Having these drivers installed is really not preferable, however, if I want to use this machine for pretty much anything else. Is this something I should report to an upstream, or is this something that can be fixed on the Blender side? For anyone who might need it, here are the steps I took for Arch, essentially using [this](https://wiki.archlinux.org/title/AMDGPU_PRO) Arch Wiki article: ```bash yay -S amdgpu-pro-oglp lib32-amdgpu-pro-oglp vulkan-amdgpu-pro lib32-vulkan-amdgpu-pro amf-amdgpu-pro progl blender ``` ![image](/attachments/05350315-0038-4cca-a917-ea4217bb138e)

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391 KiB

Pratik Borhade commented

2023-11-08 12:55:46 +01:00

Thanks.

The proprietary drivers do not appear to have this problem. Once those were installed, it appears antialiasing works as intended again. Having these drivers installed is really not preferable, however, if I want to use this machine for pretty much anything else.

@Jeroen-Bakker hi, can you check further? Do we handle such cases on tracker?

Thanks. > The proprietary drivers do not appear to have this problem. Once those were installed, it appears antialiasing works as intended again. Having these drivers installed is really not preferable, however, if I want to use this machine for pretty much anything else. @Jeroen-Bakker hi, can you check further? Do we handle such cases on tracker?

Pratik Borhade added

Module

EEVEE & Viewport

Status

Needs Info from Developers

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Needs Information from User

labels 2023-11-08 12:56:06 +01:00

Jeroen Bakker commented

2023-11-08 16:23:53 +01:00

yes we first need to make a case and find out if it is not an error on our side.

Jeroen Bakker changed title from ~~Grease Pencil Anti-Aliasing Broken And Causes Severe Artifacts~~ to Grease Pencil Anti-Aliasing Broken on Linux/AMD

2023-11-08 16:25:39 +01:00

Jeroen Bakker commented

2023-11-08 16:30:57 +01:00

@filedescriptor @ChengduLittleA any insight from your side?
If I understand it correctly it is when you apply the line art modifier. So it might also indicate that it might point to an issue in grease pencil core as well.

@filedescriptor @ChengduLittleA any insight from your side? If I understand it correctly it is when you apply the line art modifier. So it might also indicate that it might point to an issue in grease pencil core as well.

Dakota-4 commented

2023-11-08 19:13:55 +01:00

@filedescriptor @ChengduLittleA any insight from your side?
If I understand it correctly it is when you apply the line art modifier. So it might also indicate that it might point to an issue in grease pencil core as well.

Just to clarify. It's not just the Line Art modifier, this happens to pretty much any Grease Pencil line. Both in a "2D" project, as well as manually drawn lines inside a 3D scene.

I am happy to provide screenshots / blend files if those are needed.

> @filedescriptor @ChengduLittleA any insight from your side? > If I understand it correctly it is when you apply the line art modifier. So it might also indicate that it might point to an issue in grease pencil core as well. Just to clarify. It's not just the Line Art modifier, this happens to pretty much any Grease Pencil line. Both in a "2D" project, as well as manually drawn lines inside a 3D scene. I am happy to provide screenshots / blend files if those are needed.

Jeroen Bakker commented

2023-11-09 08:20:33 +01:00

Unable to reproduce on:

Graphics card: RENOIR (renoir, LLVM 15.0.7, DRM 3.49, 6.2.0-36-generic) AMD 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1
Graphics card: Mesa Intel(R) Arc(tm) A770 Graphics (DG2) Intel 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1

Able to reproduce on:

Graphics card: GFX1100 (gfx1100, LLVM 15.0.7, DRM 3.49, 6.2.0-36-generic) AMD 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1

The latter is comparable to a RX 7800 XT so it might be specific to the RDNA3.

Failing SMAA?

SMAA edge detection and weight calculation seems to be correct. When apply-ing it seems to be incorrect.

It still points out to a driver bug in mesa, ut for RDNA3 cards specificly.

Unable to reproduce on: * Graphics card: RENOIR (renoir, LLVM 15.0.7, DRM 3.49, 6.2.0-36-generic) AMD 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1 * Graphics card: Mesa Intel(R) Arc(tm) A770 Graphics (DG2) Intel 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1 Able to reproduce on: * Graphics card: GFX1100 (gfx1100, LLVM 15.0.7, DRM 3.49, 6.2.0-36-generic) AMD 4.6 (Core Profile) Mesa 23.0.4-0ubuntu1~22.04.1 The latter is comparable to a RX 7800 XT so it might be specific to the RDNA3. Failing SMAA? ![image](/attachments/b093fe9d-dd9c-4d77-b924-aa6b18d57268) SMAA edge detection and weight calculation seems to be correct. When apply-ing it seems to be incorrect. It still points out to a driver bug in mesa, ut for RDNA3 cards specificly.

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168 KiB

Jeroen Bakker added

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Needs Info from Developers

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Report

labels 2023-11-09 08:50:01 +01:00

Jeroen Bakker added this to the EEVEE & Viewport project 2023-11-09 08:50:12 +01:00

Pratik Borhade referenced this issue

2024-01-02 11:05:25 +01:00

Grease Pencil is Currently Glitching for Me #115991

Dakota-4 commented

2024-03-11 14:20:17 +01:00

This appears to be resolved. I am unsure at what mesa / blender version it got fixed at, but I am no longer seeing this issue

This appears to be resolved. I am unsure at what mesa / blender version it got fixed at, but I am no longer seeing this issue ![image](/attachments/005f66e5-dfdf-4076-8665-1260d535ac45)

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496 KiB

👍 1

Pratik Borhade commented

2024-03-12 04:15:44 +01:00

Closing then

Pratik Borhade closed this issue

2024-03-12 04:15:49 +01:00

Blender Bot added

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