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Creation of GPencil material preview lags Blender #124945

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opened 2024-07-18 02:45:30 +02:00 by Mot-Emanc · 4 comments
Mot-Emanc commented 2024-07-18 02:45:30 +02:00
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Windows 11

Blender Version
Broken: version: 4.2.0,
Worked: version 4.1.1

Short description of error

After creating a gpencil object and the new material is assigned there's a small lag before the preview thumbnail loads.
This only happens if the material tab is visible.

It might not be noticeable in a good computer

Exact steps for others to reproduce the error

Example of 4.1.1 vs 4.2.0, both on factory settings.

Windows 11 **Blender Version** Broken: version: 4.2.0, Worked: version 4.1.1 **Short description of error** After creating a gpencil object and the new material is assigned there's a small lag before the preview thumbnail loads. This only happens if the material tab is visible. It might not be noticeable in a good computer **Exact steps for others to reproduce the error** Example of 4.1.1 vs 4.2.0, both on factory settings. <video src="/attachments/04b3eb32-cece-4172-a765-8e7e202b31a0" title="2024-07-17 20-00-59.mp4" controls></video>
2024-07-17 20-00-59.mp4
7.1 MiB
Mot-Emanc added the
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 labels 2024-07-18 02:45:31 +02:00
Alaska commented 2024-07-18 05:26:14 +02:00
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I can confirm increase stutter in Blender 4.2 compared to 4.1. I'm doubtful it's caused by changes in Grease pencil, and is probably a shader compilation thing related to EEVEE. But I haven't looked into it to verify this (Or to even verify if the greasepencil preview uses EEVEE). This might be a expected issue.

System Information
Operating system: Windows-10-10.0.22631-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 556.12
Blender version: 4.2.0, branch: blender-v4.2-release, commit date: 2024-07-16 06:20, hash: a51f293548ad

I can confirm increase stutter in Blender 4.2 compared to 4.1. I'm doubtful it's caused by changes in Grease pencil, and is probably a shader compilation thing related to EEVEE. But I haven't looked into it to verify this (Or to even verify if the greasepencil preview uses EEVEE). This might be a expected issue. **System Information** Operating system: Windows-10-10.0.22631-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 556.12 Blender version: 4.2.0, branch: blender-v4.2-release, commit date: 2024-07-16 06:20, hash: `a51f293548ad`
Pratik Borhade commented 2024-07-18 06:35:12 +02:00
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Can confirm as well. #123108 might be related.
Edit: Raised the priority for attention.

Can confirm as well. #123108 might be related. Edit: Raised the priority for attention.
Pratik Borhade added
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High
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 labels 2024-07-18 06:35:29 +02:00
Clément Foucault commented 2024-08-02 16:02:24 +02:00
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Yes, it is likely to be the cost of creating the EEVEE instance and the shaders associated. This requires some profiling to find the root cause.

However, there are not enough workforce for it during the summer so I will reduce the priority.

Yes, it is likely to be the cost of creating the EEVEE instance and the shaders associated. This requires some profiling to find the root cause. However, there are not enough workforce for it during the summer so I will reduce the priority.
Clément Foucault added
Severity
Normal
 and removed
Severity
High
 labels 2024-08-02 16:02:35 +02:00
Bart van der Braak added
Type
Bug
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Type
Report
 labels 2024-08-14 12:56:13 +02:00
Christine Lemmer-Webber commented 2024-10-29 18:04:46 +01:00
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Just confirming this happens on my Linux machine on Blender 4.2, and doesn't happen in Blender 4.1. I'm on an integrated Intel GPU, so it doesn't seem to just be on Windows w/ Nvidia.

It's enough of a problem where I'm having to use 4.1 for now for all Grease Pencil things. I think the previous severity seemed justified to me, at least.

Just confirming this happens on my Linux machine on Blender 4.2, and doesn't happen in Blender 4.1. I'm on an integrated Intel GPU, so it doesn't seem to just be on Windows w/ Nvidia. It's enough of a problem where I'm having to use 4.1 for now for all Grease Pencil things. I think the previous severity seemed justified to me, at least.
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Reference: blender/blender#124945
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