Stereo render display significantly slows down rendering #73701

New Issue

Brian Trepanier · 2020-02-10T00:36:02+01:00

Brian Trepanier commented

2020-02-10 00:36:02 +01:00

System Information
Operating system: Win10 with 32GB RAM
Graphics card: 2080Ti

Blender Version
2.81, 2.83 (sub 2), branch: master, commit date: 2020-02-04 23:04, hash: 79003fa0c4

Short description of error
Cycles in CUDA mode.
Enabling the Show Stereo option (in the temporary Render Window) seriously slows down rendering.

Exact steps for others to reproduce the error

Open attached file
Enable Stereoscopy
Render and note time
Disable Show Stereo (in the image editor topbar)

Render and compare time

renderStereo.blend

Some numbers
Rendering attached file with 1 eye: 5s (so you would expect a stereo render to be ~10s)
Rendering attached file with in stereo with show_stereo_3d on: 45s.
Rendering attached file with in stereo with show_stereo_3d off: 10s

It's clear that displaying the anaglyph view significantly slows down rendering at high resolution.

**System Information** Operating system: Win10 with 32GB RAM Graphics card: 2080Ti **Blender Version** 2.81, 2.83 (sub 2), branch: master, commit date: 2020-02-04 23:04, hash: `79003fa0c4` **Short description of error** Cycles in CUDA mode. Enabling the `Show Stereo` option (in the temporary Render Window) seriously slows down rendering. ![image.png](https://archive.blender.org/developer/F8335405/image.png) **Exact steps for others to reproduce the error** - Open attached file - Enable `Stereoscopy` - Render and note time - Disable `Show Stereo` (in the image editor topbar) # Render and compare time [renderStereo.blend](https://archive.blender.org/developer/F8333580/renderStereo.blend) **Some numbers** Rendering attached file with 1 eye: 5s (so you would expect a stereo render to be ~10s) Rendering attached file with in stereo with show_stereo_3d on: 45s. Rendering attached file with in stereo with show_stereo_3d off: 10s It's clear that displaying the anaglyph view significantly slows down rendering at high resolution.

Brian Trepanier commented

2020-02-10 00:36:02 +01:00

Added subscriber: @trepaning

blender-admin commented

2020-02-10 00:36:02 +01:00

#78998 was marked as duplicate of this issue

Germano Cavalcante commented

2020-02-10 15:49:43 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-02-10 15:49:43 +01:00

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

Germano Cavalcante closed this issue

2020-02-10 15:49:43 +01:00

Germano Cavalcante self-assigned this 2020-02-10 15:49:43 +01:00

Germano Cavalcante commented

2020-02-10 15:49:43 +01:00

It is probably not a bug, but the rendering must have reached the limits of the RAM and the OS must be having a hard time with memory management.
To make sure it's a bug we need a simple .blend file and steps to reproduce the problem.
Also provide the system-info.txt generated in Help -> Save System Info.

The report can be reopened if the requested information is provided.

It is probably not a bug, but the rendering must have reached the limits of the RAM and the OS must be having a hard time with memory management. To make sure it's a bug we need a simple .blend file and steps to reproduce the problem. Also provide the `system-info.txt` generated in `Help -> Save System Info`. The report can be reopened if the requested information is provided.

Mike Pan commented

2020-02-10 16:41:51 +01:00

Added subscriber: @MikePan

Mike Pan commented

2020-02-10 16:41:51 +01:00

This is most definitely not an issue caused by system memory limitation. We've seen very similar behavior when rendering 6k panorama images in stereo. When the rendering is being displayed on screen, you get a dramatic (2-5x) slowdown in render time. This ONLY happens in stereo renders.

Brian Trepanier commented

2020-02-10 23:03:40 +01:00

my system specs

nvidia geforce rtx 2070

OS Name Microsoft Windows 10 Home
Version 10.0.18362 Build 18362
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Manufacturer Dell Inc.
System Model G5 5090
System Type x64-based PC
System SKU 0947
Processor Intel(R) Core(TM) i7-9700 CPU @ 3.00GHz, 3000 Mhz, 8 Core(s), 8 Logical Processor(s)
BIOS Version/Date Dell Inc. 1.1.2, 2019-11-06
SMBIOS Version 3.1
Embedded Controller Version 255.255
BIOS Mode UEFI
BaseBoard Manufacturer Dell Inc.
BaseBoard Product 0DXJD9
BaseBoard Version A00
Platform Role Desktop
Secure Boot State On
PCR7 Configuration Elevation Required to View
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume3
Locale United States
Hardware Abstraction Layer Version = "10.0.18362.387"
Time Zone Pacific Standard Time
Installed Physical Memory (RAM) 16.0 GB
Total Physical Memory 15.9 GB
Available Physical Memory 11.7 GB
Total Virtual Memory 18.5 GB
Available Virtual Memory 12.2 GB
Page File Space 2.63 GB
Page File C:\pagefile.sys
Hyper-V - VM Monitor Mode Extensions Yes
Hyper-V - Second Level Address Translation Extensions Yes
Hyper-V - Virtualization Enabled in Firmware Yes
Hyper-V - Data Execution Protection Yes

OS and Blender are on C drive, all project files and saves are on D drive

my system specs nvidia geforce rtx 2070 OS Name Microsoft Windows 10 Home Version 10.0.18362 Build 18362 Other OS Description Not Available OS Manufacturer Microsoft Corporation System Manufacturer Dell Inc. System Model G5 5090 System Type x64-based PC System SKU 0947 Processor Intel(R) Core(TM) i7-9700 CPU @ 3.00GHz, 3000 Mhz, 8 Core(s), 8 Logical Processor(s) BIOS Version/Date Dell Inc. 1.1.2, 2019-11-06 SMBIOS Version 3.1 Embedded Controller Version 255.255 BIOS Mode UEFI BaseBoard Manufacturer Dell Inc. BaseBoard Product 0DXJD9 BaseBoard Version A00 Platform Role Desktop Secure Boot State On PCR7 Configuration Elevation Required to View Windows Directory C:\Windows System Directory C:\Windows\system32 Boot Device \Device\HarddiskVolume3 Locale United States Hardware Abstraction Layer Version = "10.0.18362.387" Time Zone Pacific Standard Time Installed Physical Memory (RAM) 16.0 GB Total Physical Memory 15.9 GB Available Physical Memory 11.7 GB Total Virtual Memory 18.5 GB Available Virtual Memory 12.2 GB Page File Space 2.63 GB Page File C:\pagefile.sys Hyper-V - VM Monitor Mode Extensions Yes Hyper-V - Second Level Address Translation Extensions Yes Hyper-V - Virtualization Enabled in Firmware Yes Hyper-V - Data Execution Protection Yes OS and Blender are on C drive, all project files and saves are on D drive

Germano Cavalcante commented

2020-02-10 23:21:33 +01:00

Added subscriber: @brecht

Germano Cavalcante commented

2020-02-10 23:21:33 +01:00

In #73701#868829, @MikePan wrote:
This is most definitely not an issue caused by system memory limitation. We've seen very similar behavior when rendering 6k panorama images in stereo. When the rendering is being displayed on screen, you get a dramatic (2-5x) slowdown in render time. This ONLY happens in stereo renders.

It still seems related.
"stereo renders" = two images to render at the same time = more memory required.

@trepaning, without a file it is not be practical to investigate (There are many others reports to investigate and the problem seens to be a limitation in your system memory which is not considered a bug).

@brecht, as a cycles developer, do you have any idea what might actually be happening?

> In #73701#868829, @MikePan wrote: > This is most definitely not an issue caused by system memory limitation. We've seen very similar behavior when rendering 6k panorama images in stereo. When the rendering is being displayed on screen, you get a dramatic (2-5x) slowdown in render time. This ONLY happens in stereo renders. It still seems related. `"stereo renders"` = two images to render at the same time = more memory required. @trepaning, without a file it is not be practical to investigate (There are many others reports to investigate and the problem seens to be a limitation in your system memory which is not considered a bug). @brecht, as a cycles developer, do you have any idea what might actually be happening?

Brian Trepanier commented

2020-02-10 23:24:33 +01:00

In #73701#869216, @mano-wii wrote:

In #73701#868829, @MikePan wrote:
This is most definitely not an issue caused by system memory limitation. We've seen very similar behavior when rendering 6k panorama images in stereo. When the rendering is being displayed on screen, you get a dramatic (2-5x) slowdown in render time. This ONLY happens in stereo renders.

It still seems related.
"stereo renders" = two images to render at the same time = more memory required.

without displaying the render, it takes 1 minute and 19 seconds to render

> In #73701#869216, @mano-wii wrote: >> In #73701#868829, @MikePan wrote: >> This is most definitely not an issue caused by system memory limitation. We've seen very similar behavior when rendering 6k panorama images in stereo. When the rendering is being displayed on screen, you get a dramatic (2-5x) slowdown in render time. This ONLY happens in stereo renders. > > It still seems related. > `"stereo renders"` = two images to render at the same time = more memory required. without displaying the render, it takes 1 minute and 19 seconds to render

Germano Cavalcante commented

2020-02-10 23:30:28 +01:00

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

Germano Cavalcante reopened this issue

2020-02-10 23:30:28 +01:00

Mike Pan commented

2020-02-10 23:46:25 +01:00

Let me add another concrete data point to help with the triaging:

renderStereo.blend

Win10 with 32GB RAM, 2080Ti running Cycles in CUDA mode with Blender 2.81, with renders being outputted to a new image editor window:

Rendering attached file with 1 eye: 5s (so you would expect a stereo render to be ~10s)
Rendering attached file with in stereo with show_stereo_3d on: 45s.
Rendering attached file with in stereo with show_stereo_3d off: 10s

It's clear that displaying the anaglyph view significantly slows down rendering at high resolution.

Let me add another concrete data point to help with the triaging: [renderStereo.blend](https://archive.blender.org/developer/F8333580/renderStereo.blend) Win10 with 32GB RAM, 2080Ti running Cycles in CUDA mode with Blender 2.81, with renders being outputted to a new image editor window: Rendering attached file with 1 eye: 5s (so you would expect a stereo render to be ~10s) Rendering attached file with in stereo with show_stereo_3d on: 45s. Rendering attached file with in stereo with show_stereo_3d off: 10s It's clear that displaying the anaglyph view significantly slows down rendering at high resolution.

Dalai Felinto commented

2020-02-11 12:57:37 +01:00

Added subscriber: @dfelinto

Dalai Felinto commented

2020-02-11 12:57:37 +01:00

Thanks for the file Mike, it certainly helps (haven't opened it yet though)

Germano Cavalcante commented

2020-02-11 13:41:06 +01:00

@MikePan, thanks for the file.
I can confirm that something is wrong with the Show Stereo option.
But I'm still not sure if it is the cause of the 17-minute delay reported (@trepaning, can you confirm).

If it is not the same problem it must be reported separately.

@MikePan, thanks for the file. I can confirm that something is wrong with the `Show Stereo` option. But I'm still not sure if it is the cause of the 17-minute delay reported (@trepaning, can you confirm). If it is not the same problem it must be reported separately.

Brian Trepanier commented

2020-02-11 14:59:11 +01:00

I do not know how to turn show_stereo_3d on and off but

rendering with Blender displaying the render process takes 17 minutes.

Using a BATfile renders the same image in 1 minute and 19 secondsBAT content**
cd C:\Program Files\Blender Foundation\Blender 2.81
blender -b "D:\TheMusicOfJunk-Rhythm_FINALS\RENDER2020-360Tets.blend" -a

I do not know how to turn show_stereo_3d on and off but rendering with Blender displaying the render process takes 17 minutes. Using a BAT**file renders the same image in 1 minute and 19 seconds**BAT content** cd C:\Program Files\Blender Foundation\Blender 2.81 blender -b "D:\TheMusicOfJunk-Rhythm\_FINALS\RENDER2020-360Tets.blend" -a

Brian Trepanier commented

2020-02-11 15:08:48 +01:00

Mike Pan's test file rendered at 7 seconds as individual,
but 1 minute and 12 seconds as stereo.

Using BAT file, it rendered in 7 seconds.

Mike Pan's test file rendered at 7 seconds as individual, but 1 minute and 12 seconds as stereo. Using BAT file, it rendered in 7 seconds.

Germano Cavalcante commented

2020-02-11 15:30:40 +01:00

In #73701#869679, @trepaning wrote:
I do not know how to turn show_stereo_3d on and off but

Try rendering with and without this option:

> In #73701#869679, @trepaning wrote: > I do not know how to turn show_stereo_3d on and off but > Try rendering with and without this option: ![image.png](https://archive.blender.org/developer/F8334762/image.png)

Brecht Van Lommel changed title from ~~360 3d rendering issue - long render time, parts not drawn~~ to Stereo render display significantly slows down rendering

2020-02-11 15:38:37 +01:00

Brecht Van Lommel commented

2020-02-11 15:38:37 +01:00

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

Germano Cavalcante was unassigned by Brecht Van Lommel

2020-02-11 15:38:54 +01:00

Brecht Van Lommel commented

2020-02-11 15:39:23 +01:00

(Assuming the assignment was not intentional and just part of closing the task initially.)

Brian Trepanier commented

2020-02-11 19:57:01 +01:00

In #73701#869685, @mano-wii wrote:

In #73701#869679, @trepaning wrote:
I do not know how to turn show_stereo_3d on and off but

Try rendering with and without this option:

Holy moly, yes sir, that decreased render time to acceptable, thanks.

with display showing render taking place but 3d stereo turned off, this took 1 minute 30 seconds to render.

> In #73701#869685, @mano-wii wrote: >> In #73701#869679, @trepaning wrote: >> I do not know how to turn show_stereo_3d on and off but >> > > Try rendering with and without this option: > ![image.png](https://archive.blender.org/developer/F8334762/image.png) Holy moly, yes sir, that decreased render time to acceptable, thanks. with display showing render taking place but 3d stereo turned off, this took 1 minute 30 seconds to render. ![360renderTest-1m30s.jpg](https://archive.blender.org/developer/F8335332/360renderTest-1m30s.jpg)

Zsolt Stefan commented

2020-02-13 11:34:50 +01:00

Added subscriber: @ZsoltStefan

Zsolt Stefan commented

2020-02-13 11:34:50 +01:00

I had posted this bug before: https://developer.blender.org/T53290 . It seemed to be resolved. ??

Mike Pan commented

2020-02-13 17:30:40 +01:00

That ticket does offer a workaround. By switching to GLSL, I can avoid most of the slowdowns. But it's still slower than expected.

Single Eye: 3s
Stereo Expected: 6s
Stereo GLSL: 8s
Stereo 2D Texture/Automatic: 48s

Interesting that when set to automatic, it seems to pick 2D texture instead of GLSL as #53290 implies.

That ticket does offer a workaround. By switching to GLSL, I can avoid most of the slowdowns. But it's still slower than expected. Single Eye: 3s Stereo Expected: 6s Stereo GLSL: 8s Stereo 2D Texture/Automatic: 48s Interesting that when set to automatic, it seems to pick 2D texture instead of GLSL as #53290 implies.

Brecht Van Lommel commented

2020-07-17 17:12:32 +02:00

Added subscribers: @yosi, @bent, @Memento

Dalai Felinto commented

2020-10-16 11:13:26 +02:00

This seems to be fixed now in (the upcoming 2.91) since (4212b6528a) - image draw refactor. Closing it now, let me know if the issue is still around.

This seems to be fixed now in (the upcoming 2.91) since (4212b6528afb0) - image draw refactor. Closing it now, let me know if the issue is still around.

Philipp Oeser removed the

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Stereo render display significantly slows down rendering #73701

Render and compare time