Motion Blur weird artifacts when rendering MeshSequenceCache USD #110004

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opened 2023-07-12 11:27:43 +02:00 by Redwolf · 7 comments

Redwolf commented

2023-07-12 11:27:43 +02:00

System Information
Operating system: Windows 11
Graphics card: RTX 2080 Ti

Blender Version
Broken: 3.6 LTS, but it also seem to happen in older versions

Short description of error

I'm getting some weird artifacts when rendering a USD mesh cache with motion blur enabled.

I've exported the mesh from maya 2023 using the Arnold USD export method.

What i've tried:

Disable Auto Smooth Normals and removing every Subdivision Surface Modifier.
Trying to change the position of the motion blur from Center to Start or End

The problem persist.

Exact steps for others to reproduce the error
Export a high res mesh animation from Maya using Arnold USD as export option.

Import it in Blender and try to render the sequence with Motion Blur activated.

Blend file Link : https://drive.google.com/file/d/1drWORd3Bq8tzGpGY8d9Czb_KQYMT5o4r/view?usp=sharing

**System Information** Operating system: Windows 11 Graphics card: RTX 2080 Ti **Blender Version** Broken: 3.6 LTS, but it also seem to happen in older versions **Short description of error** I'm getting some weird artifacts when rendering a USD mesh cache with motion blur enabled. I've exported the mesh from maya 2023 using the Arnold USD export method. What i've tried: - Disable Auto Smooth Normals and removing every Subdivision Surface Modifier. - Trying to change the position of the motion blur from Center to Start or End The problem persist. **Exact steps for others to reproduce the error** Export a high res mesh animation from Maya using Arnold USD as export option. Import it in Blender and try to render the sequence with Motion Blur activated. Blend file Link : https://drive.google.com/file/d/1drWORd3Bq8tzGpGY8d9Czb_KQYMT5o4r/view?usp=sharing

5b20a143388bf92d14bf33b84e4ac2bf.png

277 KiB

thumb-Clipboard - 12 luglio 2023 10_37.png

228 KiB

thumb-Clipboard - 12 luglio 2023 10_37.png

Redwolf added the

labels 2023-07-12 11:27:43 +02:00

Redwolf changed title from ~~Motion Blur weird artifacts MeshSequenceCache USD~~ to Motion Blur weird artifacts when rendering MeshSequenceCache USD

2023-07-12 11:27:58 +02:00

Redwolf changed title from ~~Motion Blur weird artifacts when rendering MeshSequenceCache USD~~ to Motion Blur weird artifacts when rendering MeshSequenceCache USD

2023-07-12 11:30:34 +02:00

Iliya Katushenock added the

Render & Cycles

labels 2023-07-12 12:02:00 +02:00

Pratik Borhade commented

2023-07-13 09:03:44 +02:00

Member

Hi, thanks for the report. Could you share the affected file?

Hi, thanks for the report. Could you share the affected file?

Pratik Borhade added

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labels 2023-07-13 09:03:53 +02:00

Philipp Oeser commented

2023-07-13 09:03:59 +02:00

Member

Could you share a .blend file (plus corresponding USD) that is already set up to render that shows this issue?
(this speeds up the proccess if multiple devs are looking at this and it ensures we are all on the same page)

Could you share a .blend file (plus corresponding USD) that is already set up to render that shows this issue? (this speeds up the proccess if multiple devs are looking at this and it ensures we are all on the same page)

Redwolf commented

2023-07-13 11:02:47 +02:00

Author

Hi, thank you for your support.

Sure i will upload the scene file and the cache via google drive as it totally weighs about 1 gb zipped and 3 gb unzipped.
@PratikPB2123 @lichtwerk

I saved this file using the blender v3.6 release c7fc78b81ecb+

You should just be able to open the file, load the missing caches and render.

The girl's hair should create some artifacts.

Hi, thank you for your support. Sure i will upload the scene file and the cache via google drive as it totally weighs about 1 gb zipped and 3 gb unzipped. @PratikPB2123 @lichtwerk I saved this file using the blender v3.6 release c7fc78b81ecb+ You should just be able to open the file, load the missing caches and render. The girl's hair should create some artifacts.

Pratik Borhade added

and removed

Needs Information from User

labels 2023-07-13 13:33:00 +02:00

Pratik Borhade commented

2023-07-14 08:54:26 +02:00

Member

Hi, thanks for files. Do you've simpler version of them in which artifacts are visible?
USD file is certainly 1GB (compressed) in size which is not very convenient for further investigation.

Hi, thanks for files. Do you've simpler version of them in which artifacts are visible? USD file is certainly 1GB (compressed) in size which is not very convenient for further investigation.

Redwolf commented

2023-07-14 12:59:37 +02:00

Author

Hello @PratikPB2123 , thank you for your answer

I've added only the interested part and zipped the files. You should be able to render the frame 99 and get the girl's hair to create the artifacts.

Link : https://drive.google.com/file/d/1drWORd3Bq8tzGpGY8d9Czb_KQYMT5o4r/view?usp=sharing (411 mb)

Hello @PratikPB2123 , thank you for your answer I've added only the interested part and zipped the files. You should be able to render the frame 99 and get the girl's hair to create the artifacts. Link : https://drive.google.com/file/d/1drWORd3Bq8tzGpGY8d9Czb_KQYMT5o4r/view?usp=sharing (411 mb)

Pratik Borhade commented

2023-07-17 09:28:04 +02:00

Member

Thanks for the file. Can confirm artifacts: image

Thanks for the file. Can confirm artifacts: [image](/attachments/1f137809-e30b-4b77-a30d-24ad267d578a)

1.8 MiB

Philipp Oeser commented

2023-07-17 10:11:31 +02:00

Member

Thanks for the file. Can confirm artifacts: image

I guess this should be confirmed then?

> Thanks for the file. Can confirm artifacts: [image](/attachments/1f137809-e30b-4b77-a30d-24ad267d578a) I guess this should be confirmed then?

Philipp Oeser added

Pipeline, Assets & IO

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labels 2023-07-17 10:11:56 +02:00

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