Multires modifier affects performance even when set to 0 subdivisions in a rigged mesh #77652

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Diogo Valadares Reis dos Santos · 2020-06-08T22:35:56+02:00

Diogo Valadares Reis dos Santos commented

2020-06-08 22:35:56 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: AMD Radeon RX 5700 XT ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.2 26.20.15029.27017

Blender Version
Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: 211b6c29f7

Short description of error
If you have an object with multiresolution modifier, it will affect the performance even with 0 subdivisions in the preview

Exact steps for others to reproduce the error

Create an object and Add a Multiresolusion modifier
rig and animate it.
Remove the fps cap from the scene or add more geometry to the base mesh if you cant see the max fps it is reaching.

or

open the file below, select the body and switch the multiresolution on and off
multires bug report.blend

In a scene where I can reach 73 fps just adding the multires reduces the performance to 49 fps

note: this problem doesn't occur if you are using regular subdivision

note 2: the only way to get the performance back is to manually deactivate the multires in every object in your scene which is a bit inconvenient whereas in a scene with only regular subdvision you can get you performance back just by using the "simplify" in the render properties.

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: AMD Radeon RX 5700 XT ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.2 26.20.15029.27017 **Blender Version** Broken: version: 2.83.0, branch: master, commit date: 2020-06-03 14:38, hash: `211b6c29f7` **Short description of error** If you have an object with multiresolution modifier, it will affect the performance even with 0 subdivisions in the preview **Exact steps for others to reproduce the error** - Create an object and Add a Multiresolusion modifier - rig and animate it. - Remove the fps cap from the scene or add more geometry to the base mesh if you cant see the max fps it is reaching. or - open the file below, select the body and switch the multiresolution on and off [multires bug report.blend](https://archive.blender.org/developer/F8606107/multires_bug_report.blend) In a scene where I can reach 73 fps just adding the multires reduces the performance to 49 fps note: this problem doesn't occur if you are using regular subdivision note 2: the only way to get the performance back is to manually deactivate the multires in every object in your scene which is a bit inconvenient whereas in a scene with only regular subdvision you can get you performance back just by using the "simplify" in the render properties.

Diogo Valadares Reis dos Santos commented

2020-06-08 22:35:56 +02:00

Added subscriber: @Diogo_Valadares

Germano Cavalcante commented

2020-06-10 16:12:17 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-06-10 16:12:17 +02:00

Could you provide a simple file showing the problem?
Perhaps it is related to the same problem described in #73199

Could you provide a simple file showing the problem? Perhaps it is related to the same problem described in #73199

Diogo Valadares Reis dos Santos commented

2020-06-10 17:01:50 +02:00

After further investigation I think it's not only the multiresolution that is causing the problem, I went back to the file where I noticed the problem and the model with the multires is also rigged AND animated.

I don't think the problem is the same as the one in #73199 because there if you turn the modifier off it still affects performance while here turning the modifier of is the only way to get the performance back.

I'll update the task with the file

After further investigation I think it's not only the multiresolution that is causing the problem, I went back to the file where I noticed the problem and the model with the multires is also rigged AND animated. I don't think the problem is the same as the one in [#73199 ](https://developer.blender.org/T73199) because there if you turn the modifier off it still affects performance while here turning the modifier of is the only way to get the performance back. I'll update the task with the file

Diogo Valadares Reis dos Santos changed title from ~~Multires modifiers affects performance even when set to 0 subdivisions~~ to Multires modifier affects performance even when set to 0 subdivisions in a rigged mesh

2020-06-10 17:05:57 +02:00

Germano Cavalcante commented

2020-06-10 19:26:21 +02:00

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

Germano Cavalcante closed this issue

2020-06-10 19:26:21 +02:00

Germano Cavalcante self-assigned this 2020-06-10 19:26:21 +02:00

Germano Cavalcante commented

2020-06-10 19:26:21 +02:00

Added subscriber: @Sergey

Germano Cavalcante commented

2020-06-10 19:26:21 +02:00

I can reproduce the problem in blender 2.83 but in the lastest development version of blender (v2.90). So this seems to have been resolved.

I don't know that commit may have brought this improvement. (@Sergey do you know any details about it?)

Please try the latest daily build: https://builder.blender.org/download/

Closing as resolved.

I can reproduce the problem in blender 2.83 but in the lastest development version of blender (v2.90). So this seems to have been resolved. I don't know that commit may have brought this improvement. (@Sergey do you know any details about it?) Please try the latest daily build: https://builder.blender.org/download/ Closing as resolved.

Sergey Sharybin commented

2020-06-11 09:29:55 +02:00

@mano-wii, I am not aware of any change which could affect on this. I also can not reproduce the issue on Linux and NVidia RTX card.

Diogo Valadares Reis dos Santos commented

2020-06-11 15:16:50 +02:00

@mano-wii is right, the problem doen't seems to appear in 2.9.

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Multires modifier affects performance even when set to 0 subdivisions in a rigged mesh #77652