Viewport animation renders take progressively longer if there is a split in the scene! #112629

New Issue

Wayne Johnson · 2023-09-20T16:32:55+02:00

Wayne Johnson commented

2023-09-20 16:32:55 +02:00

System Information
Operating system: macOS-13.5.2-arm64-arm-64bit 64 Bits
Graphics card: Metal API Apple M2 Ultra 1.2

Blender Version
Broken: version: 3.6.2, branch: blender-v3.6-release, commit date: 2023-08-16 16:43, hash: e53e55951e7a
Worked: Never

Short description of error
When animating a render from the viewport, if a spline is present in the scene each frame takes progressively longer and longer to render until it takes a painfully long time per frame. Once the spline is deleted from the scene, each frame takes the same amount of time to render!

Exact steps for others to reproduce the error
Make an animation of approx 1000 frames
Include a spline in the scene - you don't have to render it, it just needs to be in the scene!
Viewport Render Animation
You should quickly notice that each frame is taking longer and longer to render
By the time you get to frame 800 (if you care to wait that long) you will be pulling your hair out!
...now delete the spline
Viewport Render Animation
Each Frame now takes the same time to render and you can smile once more.

....I'm already guessing that whoever is gracious enough to try this will magically not have the problem - if so, please reply and I will supply files... I just would rather not at this time as I am interested to see if it is indeed reproducible? I can confidently say that I have experienced this issue for at least 5 years, but it's only now that it has come to bite me again and I have finally proven (to myself, at least) that the issue is spline related - my scene had one single 'Annotation' spline that I wasn't even aware of hanging around in it and deleting it sped up render times by an order of magnitude!

Thanks
Wayne

**System Information** Operating system: macOS-13.5.2-arm64-arm-64bit 64 Bits Graphics card: Metal API Apple M2 Ultra 1.2 **Blender Version** Broken: version: 3.6.2, branch: blender-v3.6-release, commit date: 2023-08-16 16:43, hash: `e53e55951e7a` Worked: Never **Short description of error** When animating a render from the viewport, if a spline is present in the scene each frame takes progressively longer and longer to render until it takes a painfully long time per frame. Once the spline is deleted from the scene, each frame takes the same amount of time to render! **Exact steps for others to reproduce the error** Make an animation of approx 1000 frames Include a spline in the scene - you don't have to render it, it just needs to be in the scene! Viewport Render Animation You should quickly notice that each frame is taking longer and longer to render By the time you get to frame 800 (if you care to wait that long) you will be pulling your hair out! ...now delete the spline Viewport Render Animation Each Frame now takes the same time to render and you can smile once more. ....I'm already guessing that whoever is gracious enough to try this will magically not have the problem - if so, please reply and I will supply files... I just would rather not at this time as I am interested to see if it is indeed reproducible? I can confidently say that I have experienced this issue for at least 5 years, but it's only now that it has come to bite me again and I have finally proven (to myself, at least) that the issue is spline related - my scene had one single 'Annotation' spline that I wasn't even aware of hanging around in it and deleting it sped up render times by an order of magnitude! Thanks Wayne

Wayne Johnson added the

labels 2023-09-20 16:32:55 +02:00

Pratik Borhade commented

2023-09-21 05:55:03 +02:00

Hi, thanks for the report. A sample .blend file would be helpful for investigation.
Did you notice any difference in render time between OpenGL and Metal viewport backend?

Hi, thanks for the report. A sample .blend file would be helpful for investigation. Did you notice any difference in render time between OpenGL and Metal viewport backend?

Pratik Borhade added

Status

Needs Information from User

and removed

Status

Needs Triage

labels 2023-09-21 05:55:12 +02:00

Pratik Borhade commented

2023-10-20 11:01:18 +02:00

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed. Thanks again for the report. If the problem persists please open a new report with the required information.

Pratik Borhade closed this issue

2023-10-20 11:01:21 +02:00

Blender Bot added

Status

Archived

and removed

Status

Needs Information from User

labels 2023-10-20 11:01:23 +02:00

Wayne Johnson commented

2023-10-20 12:27:33 +02:00

Apologies - further testing (rendering) showed that the spline in the scene wasn't necessarily the issue as the frames were still taking progressively longer, even with no splines in the scene. Also I didn't find the time to package up the sample file. Sorry!
I've also changed render method and am not experiencing slow down with the new method.
Thanks for your time.

Apologies - further testing (rendering) showed that the spline in the scene wasn't necessarily the issue as the frames were still taking progressively longer, even with no splines in the scene. Also I didn't find the time to package up the sample file. Sorry! I've also changed render method and am not experiencing slow down with the new method. Thanks for your time.

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Viewport animation renders take progressively longer if there is a split in the scene! #112629