Multires clay brushes performance issue #79488

New Issue

Julien Kaspar · 2020-08-03T16:59:08+02:00

Julien Kaspar commented

2020-08-03 16:59:08 +02:00

System Information
Operating system: Linux-5.4.0-42-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: Quadro GP100/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.100

Blender Version
Broken: version: 2.90.0 Beta, branch: master, commit date: 2020-08-02 18:54, hash: 0264f53e30

Short description of error
When using the multires modifier for sculpting the performance seems to suffer significantly for certain brushes. This gets even worse on lower levels so the performance often is much worse on level 1 when compared to level 3.

2020-08-03 16-22-39.mp4

The performance seems to be especially bad on the Clay & Clay Strips brushes.

Example .blend file

Just to make sure the performance is as reproducible as possible, here is the file of the jacket.
When trying to reproduce this performance on a cube or Suzanne head it wasn't as bad but still noticeable.
jacket.blend

**System Information** Operating system: Linux-5.4.0-42-generic-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: Quadro GP100/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.100 **Blender Version** Broken: version: 2.90.0 Beta, branch: master, commit date: 2020-08-02 18:54, hash: `0264f53e30` **Short description of error** When using the multires modifier for sculpting the performance seems to suffer significantly for certain brushes. This gets even worse on lower levels so the performance often is much worse on level 1 when compared to level 3. [2020-08-03 16-22-39.mp4](https://archive.blender.org/developer/F8741537/2020-08-03_16-22-39.mp4) The performance seems to be especially bad on the Clay & Clay Strips brushes. **Example .blend file** Just to make sure the performance is as reproducible as possible, here is the file of the jacket. When trying to reproduce this performance on a cube or Suzanne head it wasn't as bad but still noticeable. [jacket.blend](https://archive.blender.org/developer/F8741546/jacket.blend)

Julien Kaspar commented

2020-08-03 16:59:08 +02:00

Added subscriber: @JulienKaspar

Pablo Dobarro commented

2020-08-03 17:21:32 +02:00

Added subscriber: @PabloDobarro

Pablo Dobarro commented

2020-08-03 17:21:32 +02:00

Not sure if this is the cause of the issue, but in my computer (i7 9750H, 16GB, GTX1650 4GB) D8442 seems to fix the issue:

With 10k leaf limit:
2020-08-03 17-18-40.mp4

With 1k leaf limit:
2020-08-03 17-16-07.mp4

Not sure if this is the cause of the issue, but in my computer (i7 9750H, 16GB, GTX1650 4GB) [D8442](https://archive.blender.org/developer/D8442) seems to fix the issue: With 10k leaf limit: [2020-08-03 17-18-40.mp4](https://archive.blender.org/developer/F8741662/2020-08-03_17-18-40.mp4) With 1k leaf limit: [2020-08-03 17-16-07.mp4](https://archive.blender.org/developer/F8741663/2020-08-03_17-16-07.mp4)

Pablo Dobarro commented

2020-08-03 17:23:01 +02:00

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

Pablo Dobarro was assigned by Dalai Felinto

2020-08-06 11:37:52 +02:00

Dalai Felinto commented

2021-04-06 15:18:23 +02:00

Added subscriber: @dfelinto

Dalai Felinto commented

2021-04-06 15:18:23 +02:00

If this is not tagged as BF Blender it doesn't show up in the High Priority bugs list

Philipp Oeser removed the

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Multires clay brushes performance issue #79488