Horizontal stripe artifacts in image editor #83529

New Issue

Paul Bransford · 2020-12-07T22:53:53+01:00

Paul Bransford commented

2020-12-07 22:53:53 +01:00

Blender Version
Broken: 2.91.0, 2.92.0 (ba740ad2ab)
Worked: 2.90.1

Short description of error
Horizontal artifacts across newly rendered images in image viewer. Exported images are clean and do not contain the artifacts.

Exact steps for others to reproduce the error - A
Render display in current master:

In Blender 2.90

Example file: image_editor_line_drawing_error.blend

Note: The problem seems to happen only when the "Interface Resolution Scale" (in User Preferences) is different than 1.0 (e.g., 1.3).

Exact steps for others to reproduce the error - B
Default startup, simply render the default scene untouched. Additionally, the issue is visible regardless of rendering engine or other rendering settings such as samples, integrator, etc. The artifacts are more visible with a smooth-shaded Suzanne /w subdivision surface modifier levels 3 or 4, particularly around the top of the ear, although they are visible with the upper edges of the default cube. Selecting fractional zoom level 1:1 does not mask the artifacts, suggesting they are not scaling artifacts.

I have attached several files:

Default scene cube screenshot section:

Cube replaced /w smooth shaded monkey /w subdiv modifier:

Cropped, scaled, and level-adjusted excerpt of the prior image to more readily show the artifact:

Saved .blend of the prior render, just in case it should be useful:
292-monkey.blend.gz

**Blender Version** Broken: 2.91.0, 2.92.0 (ba740ad2abc6) Worked: 2.90.1 **Short description of error** Horizontal artifacts across newly rendered images in image viewer. Exported images are clean and do not contain the artifacts. **Exact steps for others to reproduce the error - A** Render display in current master: ![image.png](https://archive.blender.org/developer/F9591068/image.png) In Blender 2.90 ![image.png](https://archive.blender.org/developer/F9591071/image.png) Example file: [image_editor_line_drawing_error.blend](https://archive.blender.org/developer/F9591063/image_editor_line_drawing_error.blend) Note: The problem seems to happen only when the "Interface Resolution Scale" (in User Preferences) is different than 1.0 (e.g., 1.3). **Exact steps for others to reproduce the error - B** Default startup, simply render the default scene untouched. Additionally, the issue is visible regardless of rendering engine or other rendering settings such as samples, integrator, etc. The artifacts are more visible with a smooth-shaded Suzanne /w subdivision surface modifier levels 3 or 4, particularly around the top of the ear, although they are visible with the upper edges of the default cube. Selecting fractional zoom level 1:1 does not mask the artifacts, suggesting they are not scaling artifacts. I have attached several files: Default scene cube screenshot section: ![292-cube.png](https://archive.blender.org/developer/F9490532/292-cube.png) Cube replaced /w smooth shaded monkey /w subdiv modifier: ![292-monkey.png](https://archive.blender.org/developer/F9490534/292-monkey.png) Cropped, scaled, and level-adjusted excerpt of the prior image to more readily show the artifact: ![292-monkey_edited.png](https://archive.blender.org/developer/F9490536/292-monkey_edited.png) Saved .blend of the prior render, just in case it should be useful: [292-monkey.blend.gz](https://archive.blender.org/developer/F9490539/292-monkey.blend.gz)

Paul Bransford commented

2020-12-07 22:53:53 +01:00

Added subscriber: @draeath

blender-admin commented

2020-12-07 22:53:53 +01:00

#92903 was marked as duplicate of this issue

blender-admin commented

2020-12-07 22:53:53 +01:00

#82999 was marked as duplicate of this issue

blender-admin commented

2020-12-07 22:53:53 +01:00

#84932 was marked as duplicate of this issue

blender-admin commented

2020-12-07 22:53:53 +01:00

#84653 was marked as duplicate of this issue

Paul Bransford commented

2020-12-07 22:54:38 +01:00

I should note that I have confirmation from two other blender users, though I do not have details on their systems.

Edit 1: one of the users is on: Windows with Radeon RX 570

I should note that I have confirmation from two other blender users, though I do not have details on their systems. Edit 1: one of the users is on: Windows with Radeon RX 570

Paul Bransford commented

2020-12-07 22:56:38 +01:00

Possibly introduced by these changes noted in the 2.91 release notes:

UV/Image Editor
- Alpha blending are now done in Linear Scene Reference Space.
- Support of pure emissive colors.
- Improved performance; especially noticeable when viewing render results and repeating image.
- The smoothness of the UV's can now be controlled in the User preferences

Possibly introduced by these changes noted in the 2.91 release notes: - UV/Image Editor - Alpha blending are now done in Linear Scene Reference Space. - Support of pure emissive colors. - Improved performance; especially noticeable when viewing render results and repeating image. - The smoothness of the UV's can now be controlled in the User preferences

Alaska commented

2020-12-07 23:24:59 +01:00

Added subscriber: @Alaska

Alaska commented

2020-12-07 23:24:59 +01:00

I would just like to note that I was able to reproduce an issue like this during the 2.91 beta but was unable to figure out how to reproduce it reliably and the issue went away with small adjustments to the user interface.

Operating system: Linux-5.8.0-3-amd64-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: RTX 2060 SUPER 450.80.02

I would just like to note that I was able to reproduce an issue like this during the 2.91 beta but was unable to figure out how to reproduce it reliably and the issue went away with small adjustments to the user interface. Operating system: Linux-5.8.0-3-amd64-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: RTX 2060 SUPER 450.80.02

Mousy commented

2020-12-08 10:50:27 +01:00

Added subscriber: @Mousy

Mousy commented

2020-12-08 10:50:27 +01:00

https://developer.blender.org/T82999 - here is a description and demonstration of a similar bug that occurs in win7. The dependence of the appearance of a bug on the image resolution and interface configuration, in particular the vertical size of the editor, is shown.

Jeroen Bakker commented

2020-12-08 15:11:56 +01:00

Added subscriber: @Jeroen-Bakker

Jeroen Bakker commented

2020-12-08 15:11:56 +01:00

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

Jeroen Bakker commented

2020-12-08 15:11:56 +01:00

The new image engine uses float matrices and is a bit less precise and might introduce these artifacts. We should see how to solve these issues.

Robert Guetzkow commented

2021-01-13 11:25:01 +01:00

Added subscriber: @drfro5t2006

Alaska commented

2021-01-21 21:23:53 +01:00

Added subscribers: @eyecandy, @mano-wii

Jeroen Bakker self-assigned this 2021-01-22 07:52:21 +01:00

Germano Cavalcante commented

2021-01-22 15:50:38 +01:00

Added subscribers: @Vyach, @EAW

Jeroen Bakker changed title from ~~Image viewer: horizontal stripe artifacts introduced in 2.91~~ to Horizontal stripe artifacts in image editor

2021-01-25 08:05:06 +01:00

Paul R commented

2021-03-25 03:06:46 +01:00

Added subscriber: @intracube

Ermins Ermanis commented

2021-04-11 05:30:18 +02:00

Added subscriber: @erminos

Vyacheslav Kobozev commented

2021-08-30 17:34:04 +02:00

Removed subscriber: @Vyach

blender-admin commented

2021-08-30 20:12:57 +02:00

This issue was referenced by b7cb7b78a8

This issue was referenced by b7cb7b78a87dbf19d6aefe2736df7f873476bf72

Germano Cavalcante commented

2021-11-08 16:00:40 +01:00

Added subscribers: @Iscream3D, @lichtwerk

Jeroen Bakker commented

2021-11-08 16:02:37 +01:00

It seems that not all the information is in this task.

What we found out was that the issue is related to UI scaling. When setting the UI scale to 1.0 fixes the issue in most cases here at the studio. That said I still want to implement a more stable solution that will work in more cases. This should be part of #92525 (Image Engine redesign.).

It seems that not all the information is in this task. What we found out was that the issue is related to UI scaling. When setting the UI scale to 1.0 fixes the issue in most cases here at the studio. That said I still want to implement a more stable solution that will work in more cases. This should be part of #92525 (Image Engine redesign.).

Philipp Oeser commented

2021-11-08 16:08:46 +01:00

@mano-wii: I applied D12351 and it does not seem to fix #92903 unfortunately on my system

@mano-wii: I applied [D12351](https://archive.blender.org/developer/D12351) and it does not seem to fix #92903 unfortunately on my system

Tim Hurst commented

2021-12-27 17:47:46 +01:00

Added subscriber: @Tim-Hurst

Tim Hurst commented

2021-12-27 17:47:46 +01:00

I'm seeing this problem in v3.0 and setting the resolution scale has no effect

But changing the setting Interface/Display/Line Width from Default to Thick does fix it.

I'm on Windows 10

I'm seeing this problem in v3.0 and setting the resolution scale has no effect But changing the setting Interface/Display/Line Width from Default to Thick does fix it. I'm on Windows 10

Jeroen Bakker commented

2022-02-14 15:33:21 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Jeroen Bakker closed this issue

2022-02-14 15:33:21 +01:00

Jeroen Bakker commented

2022-02-14 15:33:21 +01:00

Fixed by bdd74e1e93

Fixed by bdd74e1e93

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