Render issues when two VBD overlap if rendered with motion blur #105549

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opened 2023-03-07 20:39:29 +01:00 by Robert Rioux · 6 comments

Robert Rioux commented

2023-03-07 20:39:29 +01:00

Blender Version
Broken: 3.2, 3.6
Worked: 3.1

Short description of error
Render issues when two VBD overlap if rendered with motion blur

Exact steps for others to reproduce the error
Render the attached file with and without motion blur. If you render them separatly they both render OK. Only when together it doesn't work.

**Blender Version** Broken: 3.2, 3.6 Worked: 3.1 **Short description of error** Render issues when two VBD overlap if rendered with motion blur **Exact steps for others to reproduce the error** Render the attached file with and without motion blur. If you render them separatly they both render OK. Only when together it doesn't work.

504 KiB

554 KiB

Robert Rioux added the

labels 2023-03-07 20:39:29 +01:00

Robert Rioux commented

2023-03-07 20:40:06 +01:00

Author

Looks like my file didn't upload

Looks like my file didn't upload

Robert Rioux commented

2023-03-07 20:43:06 +01:00

Author

Here's a link for the file. I guess it was too big

https://www.dropbox.com/s/um6au2fze9wvd7b/013_BC_0220_.zip?dl=0

Here's a link for the file. I guess it was too big https://www.dropbox.com/s/um6au2fze9wvd7b/013_BC_0220_.zip?dl=0

Robert Rioux commented

2023-03-07 21:35:04 +01:00

Author

Never mind. It was a clipping plane issue. But it doesn't make much sens that it does that only when MB is on.

Never mind. It was a clipping plane issue. But it doesn't make much sens that it does that only when MB is on.

Iliya Katushenock added the

Render & Cycles

label 2023-03-07 21:37:24 +01:00

Pratik Borhade commented

2023-03-08 12:20:51 +01:00

Member

Hi, thanks for the report. I can confirm the behavior.
From quick testing, this looks like a regression (Raising the priority, feel free to lower the priority since it's not a "very recent" change)

3.1	3.6/3.2

**System Information**
Operating system: Windows-10-10.0.22000-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3050 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.78```

Hi, thanks for the report. I can confirm the behavior. From quick testing, this looks like a regression (Raising the priority, feel free to lower the priority since it's not a "very recent" change) | 3.1 | 3.6/3.2 | -------- | -------- | | ![image](/attachments/b07a9dba-ea45-4b7d-9564-acc21315aaa1) | ![image](/attachments/da74a7a7-029f-4785-bfb3-ba2667e0437d) | - - - ``` **System Information** Operating system: Windows-10-10.0.22000-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3050 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.78```

1.2 MiB

1.3 MiB

Pratik Borhade added

Render & Cycles

and removed

Render & Cycles

labels 2023-03-08 12:21:57 +01:00

Brecht Van Lommel commented

2023-03-10 15:14:25 +01:00

Owner

Volume motion blur was introduced in 3.2, this is not a regression.

Volume motion blur was introduced in 3.2, this is not a regression.

Brecht Van Lommel added

and removed

labels 2023-03-10 15:14:38 +01:00

Germano Cavalcante referenced this issue

2023-08-23 21:55:22 +02:00

Volume overlap clipping #111434

Richard Traynor referenced this issue

2023-08-23 23:12:40 +02:00

Volume overlap clipping #111434

Sebastien Larocque commented

2023-10-02 02:46:26 +02:00

I’ve just updated my original bug report on a similar topic to this one. I’m writing here to invite you to look at it as it probably demonstrates the cause of the problem or a part of it.

I ran an extensive and very detailed test. Originally, I had written about overlapping volumes creating artifacts. In my new test, I discovered that non-overlapping volumes also have artifacts, but are only visible in particular cases.

I believe it is related to this report and developers should look at it in connection with this report here as it provides a new perspective and elements to understand the strange artifacts in volumes.

My new post is on October 1, 2023.
#107418 (comment)

I’ve just updated my original bug report on a similar topic to this one. I’m writing here to invite you to look at it as it probably demonstrates the cause of the problem or a part of it. I ran an extensive and very detailed test. Originally, I had written about overlapping volumes creating artifacts. In my new test, I discovered that non-overlapping volumes also have artifacts, but are only visible in particular cases. I believe it is related to this report and developers should look at it in connection with this report here as it provides a new perspective and elements to understand the strange artifacts in volumes. My new post is on October 1, 2023. https://projects.blender.org/blender/blender/issues/107418#issuecomment-1035101

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Reference: blender/blender#105549

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