vdb still showing blocky artefacts #112778

New Issue

wonderland78 · 2023-09-23T16:37:56+02:00

wonderland78 commented

2023-09-23 16:37:56 +02:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 536.67

Blender Version
Broken: version: 3.6.0 Release Candidate, branch: blender-v3.6-release, commit date: 2023-06-22 20:19, hash: fa1121765d53
Worked: (newest version of Blender that worked as expected)

Short description of error
Bug has been in effect since vdbs were implemented. It appears it was fixed but to be honest, I hadn't used vdbs in a while. Just trying them out again and the bug is back. Basically, vdbs sometimes render with blocky artefacts in cycles.

Exact steps for others to reproduce the error
I think it may have something to do with stacking multiple volumes together but this is just a guess.

Actually, this proves my hypothesis. Here we have two intersecting vdbs, when I remove one (either one) the artefact goes away.

Here is the same issue in 3.4, proving that the issue is persistent across versions...

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3060/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 536.67 **Blender Version** Broken: version: 3.6.0 Release Candidate, branch: blender-v3.6-release, commit date: 2023-06-22 20:19, hash: `fa1121765d53` Worked: (newest version of Blender that worked as expected) **Short description of error** Bug has been in effect since vdbs were implemented. It appears it was fixed but to be honest, I hadn't used vdbs in a while. Just trying them out again and the bug is back. Basically, vdbs sometimes render with blocky artefacts in cycles. **Exact steps for others to reproduce the error** I think it may have something to do with stacking multiple volumes together but this is just a guess. ![image](/attachments/451ed6d9-b729-4702-95cf-07db2d938944) Actually, this proves my hypothesis. Here we have two intersecting vdbs, when I remove one (either one) the artefact goes away. Here is the same issue in 3.4, proving that the issue is persistent across versions... ![image](/attachments/279318c3-0b87-4ec6-a26a-f51847c28d7d)

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1.3 MiB

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1.9 MiB

wonderland78 added the

labels 2023-09-23 16:37:57 +02:00

Iliya Katushenock commented

2023-09-23 16:40:43 +02:00

Hey, can you provide some simple blend\vdb file to reproduce this?

Pratik Borhade commented

2023-09-25 05:34:31 +02:00

This has been observed before due to overlapping volumes

Pratik Borhade commented

2023-09-25 05:40:48 +02:00

see: #111434, #97094, #96153, #83604, #79762
Bug reported here is related to above reports, closing.

see: #111434, #97094, #96153, #83604, #79762 Bug reported here is related to above reports, closing.

Pratik Borhade closed this issue

2023-09-25 05:40:51 +02:00

Blender Bot added

and removed

labels 2023-09-25 05:40:51 +02:00

Sebastien Larocque commented

2023-10-02 02:47:06 +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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vdb still showing blocky artefacts #112778