LineArt renders choppy in Eevee #89268

New Issue

Tom Freudenberg · 2021-06-18T18:56:57+02:00

Tom Freudenberg commented

2021-06-18 18:56:57 +02:00

System Information
Operating system: macOS-11.4-arm64-arm-64bit 64 Bits
Graphics card: Apple M 1 Apple 4.1 Metal - 71.6.4

Blender Version
Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: 84da05a8b8
tested vanilla 2.93.1RC, 3.0.0a, all show same behavior. No difference between ARM and Intel version.
Worked: n/a, not possible to test in 2.92.0

Short description of error
Choppy render results of default Grease Pencil Line Art scene/composition/object modifier in Eevee. Cycles works as expected.
Screenshot: left viewport render view, right Eevee render result with default settings

Exact steps for others to reproduce the error
Open Blender default scene, shift-a to add Grease Pencil -> Scene Line Art (or Collection/Object).
Render image with default Eevee settings. The default cube edge lines are rendered choppy.
Tried several settings on the Line Art Modifier and on the render settings without any difference in results.

**System Information** Operating system: macOS-11.4-arm64-arm-64bit 64 Bits Graphics card: Apple M 1 Apple 4.1 Metal - 71.6.4 **Blender Version** Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: `84da05a8b8` tested vanilla 2.93.1RC, 3.0.0a, all show same behavior. No difference between ARM and Intel version. Worked: n/a, not possible to test in 2.92.0 **Short description of error** Choppy render results of default Grease Pencil Line Art scene/composition/object modifier in Eevee. Cycles works as expected. Screenshot: left viewport render view, right Eevee render result with default settings ![Bildschirmfoto 2021-06-18 um 18.43.38.png](https://archive.blender.org/developer/F10180440/Bildschirmfoto_2021-06-18_um_18.43.38.png) **Exact steps for others to reproduce the error** Open Blender default scene, shift-a to add Grease Pencil -> Scene Line Art (or Collection/Object). Render image with default Eevee settings. The default cube edge lines are rendered choppy. Tried several settings on the Line Art Modifier and on the render settings without any difference in results.

Tom Freudenberg commented

2021-06-18 18:56:57 +02:00

Added subscriber: @snowflake089

Pratik Borhade commented

2021-06-19 07:39:38 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-06-19 07:39:38 +02:00

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

Pratik Borhade commented

2021-06-19 07:39:38 +02:00

Can confirm for 2.93.0LTS and also with 3.0.0 (4891da8ae2)

Can confirm for 2.93.0LTS and also with 3.0.0 (`4891da8ae2`)

Aleš Jelovčan commented

2021-06-19 08:20:26 +02:00

Added subscribers: @antoniov, @frogstomp-4

Aleš Jelovčan commented

2021-06-19 08:20:26 +02:00

@PratikPB2123 I think this can be closed as solution is provided and is also solved in 3.0.

@snowflake089, please toggle In front settings in object properties.

This will most likely be toggled on by default in 2.93.1 (@antoniov please confirm)
But beware that this will then render on top of any other grease pencil object.

In blender 3.0 this is being solved by another parameter, stroke offset, so it will be off by default again.

@PratikPB2123 I think this can be closed as solution is provided and is also solved in 3.0. @snowflake089, please toggle In front settings in object properties. ![image.png](https://archive.blender.org/developer/F10181152/image.png) This will most likely be toggled on by default in 2.93.1 (@antoniov please confirm) But beware that this will then render on top of any other grease pencil object. In blender 3.0 this is being solved by another parameter, stroke offset, so it will be off by default again.

Antonio Vazquez commented

2021-06-19 10:41:33 +02:00

@frogstomp-4 IIRC the commit with the default change was tagged for 2.93.1, but I'm not the person that moves this commit in 2.93.1.

Tom Freudenberg commented

2021-06-19 14:04:24 +02:00

@frogstomp-4 Thanks for the solution, I've tested it and it works for the lineart modifier.
Although I've realized that this issue is for other grease pencil objects as well. Two examples in the screenshot: Shadowed overlays render choppy on edges of other objects as well the same object (the drawn box on the clipboard) renders choppy on objects further away from camera. As I'm new to bug reporting, should I open another one or is this related to the same solution in 3.0?

@frogstomp-4 Thanks for the solution, I've tested it and it works for the lineart modifier. Although I've realized that this issue is for other grease pencil objects as well. Two examples in the screenshot: Shadowed overlays render choppy on edges of other objects as well the same object (the drawn box on the clipboard) renders choppy on objects further away from camera. As I'm new to bug reporting, should I open another one or is this related to the same solution in 3.0? ![Bildschirmfoto 2021-06-19 um 13.57.22.png](https://archive.blender.org/developer/F10181449/Bildschirmfoto_2021-06-19_um_13.57.22.png)

Aleš Jelovčan commented

2021-06-19 14:49:33 +02:00

@snowflake089 this is a known issue as well. In this example you are using draw on surface? In this case you need to set stroke offset a little higher. Or manually move strokes a little towards the camera. The reason is (I think, also just a user, not a blender developer) that eevee is raster renderer and as such it is placing rasterized planed in the depth space. Grease pencil is a separate rendering engine and is then competing for the same space. This is a classic z-fight problem.

There is a plan to integrate grease pencil into eevee, so the same engine will render it. There is already a branch for this and a nice blog post explaining it: https://code.blender.org/2021/06/eevees-future/

But for now there is no easy solution and you will have to keep those things in mind when puting your scene together.

@snowflake089 this is a known issue as well. In this example you are using draw on surface? In this case you need to set stroke offset a little higher. Or manually move strokes a little towards the camera. The reason is (I think, also just a user, not a blender developer) that eevee is raster renderer and as such it is placing rasterized planed in the depth space. Grease pencil is a separate rendering engine and is then competing for the same space. This is a classic z-fight problem. There is a plan to integrate grease pencil into eevee, so the same engine will render it. There is already a branch for this and a nice blog post explaining it: https://code.blender.org/2021/06/eevees-future/ But for now there is no easy solution and you will have to keep those things in mind when puting your scene together.

Marcin Twarowski commented

2021-06-21 17:11:49 +02:00

Added subscriber: @MarcinTwarowski

Marcin Twarowski commented

2021-06-21 17:11:49 +02:00

Ignore that. I missed the part about "in front".

Aleš Jelovčan commented

2021-06-21 17:15:59 +02:00

@MarcinTwarowski you can also solve this by using In front option. From 3.0a there will be stroke offset option in the lineart to solve this issue.

Marcin Twarowski commented

2021-06-21 17:25:53 +02:00

In #89268#1180222, @frogstomp-4 wrote:
@MarcinTwarowski you can also solve this by using In front option. From 3.0a there will be stroke offset option in the lineart to solve this issue.

Yes, I'm sorry. I should have read more carefully.

> In #89268#1180222, @frogstomp-4 wrote: > @MarcinTwarowski you can also solve this by using In front option. From 3.0a there will be stroke offset option in the lineart to solve this issue. Yes, I'm sorry. I should have read more carefully.

Tom Freudenberg commented

2021-06-21 21:18:36 +02:00

Thank you very much for all your support! Such a great community!
I´m closing this task, as it can be handled with a higher stroke offset, alternatively the "in front" render option and the linear stroke offset option from 3.0a on.

Thank you very much for all your support! Such a great community! I´m closing this task, as it can be handled with a higher stroke offset, alternatively the "in front" render option and the linear stroke offset option from 3.0a on.

Tom Freudenberg commented

2021-06-21 21:19:29 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Tom Freudenberg closed this issue

2021-06-21 21:19:29 +02:00

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LineArt renders choppy in Eevee #89268