Sculpt mode. Performance issues after enable/disable dyntopo with zoom #79146

New Issue

Vyacheslav Kobozev · 2020-07-21T19:55:58+02:00

2020-07-21 19:55:58 +02:00

{F8711949}System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 445.87

Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-10 20:07, hash: d2b910fafe
Same issue with blender-2.90.0-731d9f0bfa40-windows64 and 2.83.2 release

Short description of error

Grab brush do not use dyntopo even in dyntopo mode as you know. But it start to work very slow with dyntopo sometimes even without zoom.
After I switch off dyntopo back, all brushes start to work very slow.

So to reproduce:

Zoom in to heavy mesh.
Check speed of brushes on it.
Switch to dyntopo, use grab a little.
Switch back, check performance again.

I assume, that problems caused by dynamic mesh load/unload.
Please make it optional. It causes low fps, especially on dyntopo zooms.

{[F8711949](https://archive.blender.org/developer/F8711949/2020-07-21_21-01-12.mp4)}**System Information** Operating system: Windows-7-6.1.7601-SP1 64 Bits Graphics card: GeForce GTX 660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 445.87 **Blender Version** Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-10 20:07, hash: `d2b910fafe` Same issue with blender-2.90.0-731d9f0bfa40-windows64 and 2.83.2 release **Short description of error** 1. Grab brush do not use dyntopo even in dyntopo mode as you know. But it start to work very slow with dyntopo sometimes even without zoom. 2. After I switch off dyntopo back, all brushes start to work very slow. So to reproduce: 1. Zoom in to heavy mesh. 2. Check speed of brushes on it. 3. Switch to dyntopo, use grab a little. 4. Switch back, check performance again. I assume, that problems caused by dynamic mesh load/unload. Please make it optional. It causes low fps, especially on dyntopo zooms.

Vyacheslav Kobozev commented

2020-07-21 19:55:58 +02:00

Added subscriber: @Vyach

blender-admin commented

2020-07-21 19:55:58 +02:00

#83808 was marked as duplicate of this issue

Vyacheslav Kobozev changed title from ~~Sculpt mode. Performance issues~~ to Sculpt mode. Performance issues with zoom

2020-07-21 20:06:26 +02:00

Richard Antalik commented

2020-07-22 04:51:03 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-07-22 04:51:03 +02:00

I am unable to reproduce this issue. But this sounds more like a feature request than a bug.

Vyacheslav Kobozev commented

2020-07-22 11:59:49 +02:00

try with this file
tstт1.7z

try with this file [tstт1.7z](https://archive.blender.org/developer/F8713560/tstт1.7z)

Richard Antalik commented

2020-07-23 04:21:13 +02:00

Can't reproduce even on your file. Does this happen when you click on File > Defaults > Load Factory Settings and retry steps to reproduce?

Vyacheslav Kobozev commented

2020-07-23 11:58:00 +02:00

@iss yes, the same issue with factory settings.
Brush have no automasking. Mesh do not have multires.
2020-07-23_12-49-47.mp4

And here, when I add 2nd viewport Blender just hanging :(
2020-07-23_12-52-54.mp4

This problem started to annoy me since autohide was implemented. But usually I keep second viewport with fully loaded mesh, so it not appear in this case.

@iss yes, the same issue with factory settings. Brush have no automasking. Mesh do not have multires. [2020-07-23_12-49-47.mp4](https://archive.blender.org/developer/F8715633/2020-07-23_12-49-47.mp4) And here, when I add 2nd viewport Blender just hanging :( [2020-07-23_12-52-54.mp4](https://archive.blender.org/developer/F8715638/2020-07-23_12-52-54.mp4) This problem started to annoy me since autohide was implemented. But usually I keep second viewport with fully loaded mesh, so it not appear in this case.

Richard Antalik commented

2020-07-24 04:53:25 +02:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Richard Antalik commented

2020-07-24 04:53:25 +02:00

I am not sure what the problem could be. It would definitly help if you could narrow this down somehow and I will re-check. Otherwise another developer with setup similar to yours would have to reproduce this.

Vyacheslav Kobozev commented

2020-07-24 19:25:52 +02:00

@iss okay, I'll try to find more details.

Vyacheslav Kobozev commented

2020-07-25 10:52:04 +02:00

One more setup with same issue.

win 10 pro
CPU intel i5 9400 2.9GHz
Blender version: 2.83.2, master, commit date: 2020-07-09 05:50, hash: 239fbf7d93, type: Release
build date: 2020-07-09, 04:24:13
GPU GeForce GTX 1650 SUPER/PCIe/SSE2 NVIDIA
driver 4.5.0 NVIDIA 451.48

Another test on my machine (config in the topic)
version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: 375c7dc4ca
Have freezes for brush circle after making stroke, but not for brush action
2020-07-25_11-30-41.mp4

version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449 — fps for brush circle a bit slower, but not so noticable.

One more setup with same issue. win 10 pro CPU intel i5 9400 2.9GHz Blender version: 2.83.2, master, commit date: 2020-07-09 05:50, hash: 239fbf7d936f, type: Release build date: 2020-07-09, 04:24:13 GPU GeForce GTX 1650 SUPER/PCIe/SSE2 NVIDIA driver 4.5.0 NVIDIA 451.48 Another test on my machine (config in the topic) version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: `375c7dc4ca` Have freezes for brush circle after making stroke, but not for brush action [2020-07-25_11-30-41.mp4](https://archive.blender.org/developer/F8719557/2020-07-25_11-30-41.mp4) version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: `f6cb5f5449` — fps for brush circle a bit slower, but not so noticable.

Vyacheslav Kobozev commented

2020-08-27 10:45:29 +02:00

Common issue. With heavy mesh, fps in viewport go much lower just after enabling Dyntopo.
2020-08-27_10-52-18.mp4

CPU and GPU usage during rotation without dyntopo

And with dyntopo

What else can I test by my own?

Common issue. With heavy mesh, fps in viewport go much lower just after enabling Dyntopo. [2020-08-27_10-52-18.mp4](https://archive.blender.org/developer/F8813739/2020-08-27_10-52-18.mp4) CPU and GPU usage during rotation without dyntopo ![50062246.png](https://archive.blender.org/developer/F8813741/50062246.png) ![50073046.png](https://archive.blender.org/developer/F8813740/50073046.png) And with dyntopo ![50083648.png](https://archive.blender.org/developer/F8813745/50083648.png) ![50094348.png](https://archive.blender.org/developer/F8813744/50094348.png) What else can I test by my own?

Vyacheslav Kobozev commented

2020-08-28 14:15:43 +02:00

Tested under Lubuntu. Issue is the same. So it is not OS/driver issue.

Richard Antalik commented

2020-08-28 14:35:12 +02:00

Added subscriber: @lichtwerk

Richard Antalik commented

2020-08-28 14:35:12 +02:00

I am out of ideas with this case.

@lichtwerk can you check this?

I am out of ideas with this case. @lichtwerk can you check this?

Philipp Oeser commented

2020-08-28 16:03:17 +02:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

Philipp Oeser commented

2020-08-28 16:03:17 +02:00

I can confirm.

For me, it is even simpler to reproduce:

open highpoly sculpt file (or just throw a subdiv level 3-4 modifier on the default sculpting template sphere, apply)
zoom in
do a stroke (just to check "good" performance)
enable Dyntopo
disable Dyntopo
do another stroke (notice "bad" performance)

it looks like 2.82 behaves better, but I have not timed this yet

I can confirm. For me, it is even simpler to reproduce: - open highpoly sculpt file (or just throw a subdiv level 3-4 modifier on the default sculpting template sphere, apply) - zoom in - do a stroke (just to check "good" performance) - enable Dyntopo - disable Dyntopo - do another stroke (notice "bad" performance) it looks like 2.82 behaves better, but I have not timed this yet

Philipp Oeser changed title from ~~Sculpt mode. Performance issues with zoom~~ to Sculpt mode. Performance issues after enable/disable dyntopo with zoom

2020-08-28 16:03:56 +02:00

Vyacheslav Kobozev commented

2020-08-29 00:19:45 +02:00

In #79146#1004464, @lichtwerk wrote:
it looks like 2.82 behaves better, but I have not timed this yet

Even 2.79 have lower fps after еnabling dyntopo and slower Grab brush, despite Grab do not create new topology.

> In #79146#1004464, @lichtwerk wrote: > it looks like 2.82 behaves better, but I have not timed this yet Even 2.79 have lower fps after еnabling dyntopo and slower Grab brush, despite Grab do not create new topology.

Vyacheslav Kobozev commented

2020-08-29 16:57:55 +02:00

Strange thing.
In 2.79 fps is low with dintopo+solid but become fast again with dyntopo+material
2020-08-29_17-46-25.mp4

With dyntopo enbled mesh uploading (unhiding) is few times slower.
2020-08-29_17-53-11.mp4

So it looks like a lot of unnecessary geometry uploading and unloading

Strange thing. In 2.79 fps is low with dintopo+solid but become fast again with dyntopo+material [2020-08-29_17-46-25.mp4](https://archive.blender.org/developer/F8819062/2020-08-29_17-46-25.mp4) With dyntopo enbled mesh uploading (unhiding) is few times slower. [2020-08-29_17-53-11.mp4](https://archive.blender.org/developer/F8819072/2020-08-29_17-53-11.mp4) So it looks like a lot of unnecessary geometry uploading and unloading

Chingiz Jumagulov commented

2020-08-30 12:47:51 +02:00

Added subscriber: @MeshVoid

Vyacheslav Kobozev commented

2020-08-30 13:36:41 +02:00

Same performance issue appears on zoom after few minutes of work. Even without dyntopo.

Jer Bot commented

2020-12-25 07:26:09 +01:00

Added subscriber: @JerBot

Jer Bot commented

2020-12-25 07:26:09 +01:00

I'm experiencing a very similar issue, although I am not using dyntypo.
To trigger the lag, I only need to jump in and out of sculpt mode.
To fix, I zoom out and zoom in.

I'm on latest build(s) of Manjaro Linux using an nVidia 1060 w/ latest drivers (455). Can replicate this problem in Blender 2.91 and 2.92 Alpha (Dec 24th).

In the example, I'm using a freshly imported hi-poly OBJ file

I activate sculpt mode and start sculpting and it's laggy.
I zoom out to view the whole model, and immediately zoom back in and everything super fast and responsive.
I deactivate and reactivate sculpt mode, and it's laggy again.
I zoom out then in, and it's fixed again.
repeat

Video demonstration.
2020-12-24_22-35-30_lagZoomFixDemo.mp4

Here's the Sketchfab (OBJ) model I'm testing on, which you can download and test for yourself.

Neytiri - Na'vi bust : by Reverse Imagineering
https://skfb.ly/6CINX

I'm now wondering just how long I've been experiencing this issue, as I've noticed significant jumps and drops in performance... for the past few months, at least. Most of the time I've been just experiencing the lag, and always wondering how everyone is able to have such snappy feedback. I often work with photogrammetry scans.

P.S. I hope you guys have good garbage collecting, as I've uploaded the demo video a handful of times, with different names, before I got it correct. Sry!

I'm experiencing a very similar issue, although I am **not using dyntypo**. To trigger the lag, I only need to jump in and out of sculpt mode. To fix, I zoom out and zoom in. I'm on latest build(s) of Manjaro Linux using an nVidia 1060 w/ latest drivers (455). Can replicate this problem in Blender 2.91 and 2.92 Alpha (Dec 24th). In the example, I'm using a freshly imported hi-poly OBJ file 1. I activate sculpt mode and start sculpting and it's laggy. 2. I zoom out to view the whole model, and immediately zoom back in and everything super fast and responsive. 3. I deactivate and reactivate sculpt mode, and it's laggy again. 4. I zoom out then in, and it's fixed again. 5. *repeat* Video demonstration. [2020-12-24_22-35-30_lagZoomFixDemo.mp4](https://archive.blender.org/developer/F9529442/2020-12-24_22-35-30_lagZoomFixDemo.mp4) Here's the Sketchfab (OBJ) model I'm testing on, which you can download and test for yourself. **Neytiri - Na'vi bust : by Reverse Imagineering** https://skfb.ly/6CINX I'm now wondering just how long I've been experiencing this issue, as I've noticed significant jumps and drops in performance... for the past few months, at least. Most of the time I've been just experiencing the lag, and always wondering how everyone is able to have such snappy feedback. I often work with photogrammetry scans. P.S. I hope you guys have good garbage collecting, as I've uploaded the demo video a handful of times, with different names, before I got it correct. Sry!

Richard Antalik commented

2020-12-27 14:30:10 +01:00

Added subscriber: @Likkez-2

blender-admin commented

2021-01-05 20:23:25 +01:00

This issue was referenced by 2ed6055209

This issue was referenced by 2ed605520959eca9c0ab3c497c85578e138936b4

Pablo Dobarro commented

2021-01-05 21:03:22 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Pablo Dobarro closed this issue

2021-01-05 21:03:22 +01:00

Pablo Dobarro self-assigned this 2021-01-05 21:03:22 +01:00

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Sculpt mode. Performance issues after enable/disable dyntopo with zoom #79146