Motion Blur is Not Working on Cycles #97413

New Issue

Federico Engel · 2022-04-17T23:42:50+02:00

Federico Engel commented

2022-04-17 23:42:50 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15

Blender Version
Broken: version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: c77597cd0e
Worked: (newest version of Blender that worked as expected)

Short description of error
The Motion Blur in Blender Cycles is Broken, When I enable the Motion Blur in render properties, in some Frames of the Scene when Rendering some Strange Defects occur on the models. I have been having this problem since blender 2.9 was released. i thought it could be the Model that i Used in the scene is the problem, but I don't think, because the problem happens with all objects and models. that's why I think that blender's motion blur is not working properly.

in these images we can see the problem, the up image is with the Motion Blur Enabled, and the Other is Without the Motion Blur:

Exact steps for others to reproduce the error
It's Only enabling the Motion Blur Option in Render Propeties.
I Tried to Use the Motion Blur in The Compositor, but is the same error.

blender motion blur test.rar

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15 **Blender Version** Broken: version: 3.1.0, branch: master, commit date: 2022-03-08 18:16, hash: `c77597cd0e` Worked: (newest version of Blender that worked as expected) **Short description of error** The Motion Blur in Blender Cycles is Broken, When I enable the Motion Blur in render properties, in some Frames of the Scene when Rendering some Strange Defects occur on the models. I have been having this problem since blender 2.9 was released. i thought it could be the Model that i Used in the scene is the problem, but I don't think, because the problem happens with all objects and models. that's why I think that blender's motion blur is not working properly. in these images we can see the problem, the up image is with the Motion Blur Enabled, and the Other is Without the Motion Blur: ![FJEOodXXwAILzam.jpg](https://archive.blender.org/developer/F13006759/FJEOodXXwAILzam.jpg) ![vlcsnap-2022-04-17-18h20m45s803.png](https://archive.blender.org/developer/F13006760/vlcsnap-2022-04-17-18h20m45s803.png) **Exact steps for others to reproduce the error** It's Only enabling the Motion Blur Option in Render Propeties. I Tried to Use the Motion Blur in The Compositor, but is the same error. [blender motion blur test.rar](https://archive.blender.org/developer/F13007418/blender_motion_blur_test.rar) ![Captura de pantalla 2022-04-17 183511.png](https://archive.blender.org/developer/F13006770/Captura_de_pantalla_2022-04-17_183511.png)

Federico Engel commented

2022-04-17 23:42:50 +02:00

Added subscriber: @Lipse

Pratik Borhade commented

2022-04-18 04:48:37 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-04-18 04:48:37 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Pratik Borhade commented

2022-04-18 04:48:37 +02:00

Hi, thanks for the report. Please upload simple .blend file to test this.

having this problem since blender 2.9 was released

Do you mean 2.93? or 2.90?

Hi, thanks for the report. Please upload simple .blend file to test this. > having this problem since blender 2.9 was released Do you mean 2.93? or 2.90?

Federico Engel commented

2022-04-18 06:15:30 +02:00

{F13007418}>>! In #97413#1342642, @PratikPB2123 wrote:

Hi, thanks for the report. Please upload simple .blend file to test this.

having this problem since blender 2.9 was released

Do you mean 2.93? or 2.90?

Yes, I Mean Blender 2.93, but This Proyect was made in blender 3.0

{[F13007418](https://archive.blender.org/developer/F13007418/blender_motion_blur_test.rar)}>>! In #97413#1342642, @PratikPB2123 wrote: > Hi, thanks for the report. Please upload simple .blend file to test this. > >> having this problem since blender 2.9 was released > Do you mean 2.93? or 2.90? Yes, I Mean Blender 2.93, but This Proyect was made in blender 3.0

Pratik Borhade commented

2022-04-18 06:28:19 +02:00

Hi, thanks for the file.
Simple example files will be more handy for identifying the issue.

Normally .blend files can be simplified by removing most objects, textures, shaders and disabling settings, until the problem reveals itself more clearly

Hi, thanks for the file. Simple example files will be more handy for identifying the issue. > Normally .blend files can be simplified by removing most objects, textures, shaders and disabling settings, until the problem reveals itself more clearly

Thomas Dinges commented

2022-04-18 10:23:35 +02:00

Added subscriber: @ThomasDinges

Thomas Dinges commented

2022-04-18 10:23:35 +02:00

You created this scene in Blender 3.0 and now try to render it in 2.93? That might be the issue, opening newer projects in older Blender versions might not be compatible. Does it render properly in Blender 3.0?

Federico Engel commented

2022-04-18 16:24:51 +02:00

In #97413#1342771, @ThomasDinges wrote:
You created this scene in Blender 3.0 and now try to render it in 2.93? That might be the issue, opening newer projects in older Blender versions might not be compatible. Does it render properly in Blender 3.0?

No, This Proyect that I Sent was All Created and Rendered in Blender 3.0, I just mentioned that in previous projects when I was using Version 2.93 this problem kept happening.

> In #97413#1342771, @ThomasDinges wrote: > You created this scene in Blender 3.0 and now try to render it in 2.93? That might be the issue, opening newer projects in older Blender versions might not be compatible. Does it render properly in Blender 3.0? No, This Proyect that I Sent was All Created and Rendered in Blender 3.0, I just mentioned that in previous projects when I was using Version 2.93 this problem kept happening.

Pratik Borhade commented

2022-04-26 05:51:11 +02:00

Maybe related to these reports #82426, #97571

Simple example files will be more handy for identifying the issue.

Much appreciated if you can provide this.

Maybe related to these reports #82426, #97571 > Simple example files will be more handy for identifying the issue. Much appreciated if you can provide this.

Pratik Borhade commented

2022-05-24 15:51:50 +02:00

Added subscriber: @iss

Pratik Borhade commented

2022-05-24 15:51:50 +02:00

Seems to be same case as in #82426 (Motion blur artifacts on complex object animation (reproducable))
@iss, can you verify this? I don't think I'll be able to render complex file

Seems to be same case as in #82426 (Motion blur artifacts on complex object animation (reproducable)) @iss, can you verify this? I don't think I'll be able to render complex file

Richard Antalik commented

2022-05-25 00:20:46 +02:00

I can't reproduce glitches with 3.1.2 or 3.3 alpha. For info I rendered frame 222. Simplified file would be appreciated.
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.65

Not sure if it's same as #82426, since reported last working version does not quite match (but it's close), issue looks very similar though.

@Lipse Please check if this happens with latest alpha build from https://builder.blender.org/download/daily/

I can't reproduce glitches with 3.1.2 or 3.3 alpha. For info I rendered frame 222. Simplified file would be appreciated. Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 511.65 Not sure if it's same as #82426, since reported last working version does not quite match (but it's close), issue looks very similar though. @Lipse Please check if this happens with latest alpha build from https://builder.blender.org/download/daily/

Pratik Borhade commented

2022-06-02 09:01:56 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Pratik Borhade closed this issue

2022-06-02 09:01:56 +02:00

Pratik Borhade commented

2022-06-02 09:01:56 +02:00

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed. Thanks again for the report. If the problem persists please open a new report with the required information.

Y-J commented

2023-06-16 13:16:23 +02:00

I still encountered this problem when I used blender 3.5.1. When motion blur is turned on, strange tugging lines appear, but they disappear when rendered to the next frame. It seems to me that it lost the vertex position or the vertex normal data in the frame that went wrong, but then refreshed it back. This model is made of skin animation, the model itself is not a regular quadrilateral, there will be triangular surface stretching dislocation when moving. So I wonder if it has something to do with the sudden crossover of models; Motion blur use Center on Frame.

Richard Antalik commented

2023-06-19 19:22:36 +02:00

@Y-J Please create new report, this issue is year old.

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Motion Blur is Not Working on Cycles #97413