Particle system error with evee #87368

New Issue

Akash banerjee · 2021-04-10T07:32:25+02:00

Akash banerjee commented

2021-04-10 07:32:25 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce GTX 1650/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.72

Blender Version
Broken: (example: 2.80, edbf15d3c0, master, 2018-11-28, as found on the splash screen)
Worked: (newest version of Blender that worked as expected)

Short description of error

The particle system with evee rendering engine: The amount of particles in render are being overridden by the Viewport Display Amount factor. If I understand correctly the mentioned factor should only affect the display in viewport not in renders.

Google Drive link -

https://drive.google.com/drive/folders/1tr2d2VieT7binIXTmRWjdjVT82X3uUEI?usp=sharing

Exact steps for others to reproduce the error

The issue can be repeated by selecting hair particles around 60k, then rendering once and rendering again changing the Viewport Display factor below 100%. I am not certain if the materials and shape of the spline will make it more visible or not but implementing 5+ simple children might affect.

Based on the default startup or an attached .blend file (as simple as possible).

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce GTX 1650/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.72 **Blender Version** Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen) Worked: (newest version of Blender that worked as expected) **Short description of error** The particle system with evee rendering engine: The amount of particles in render are being overridden by the Viewport Display Amount factor. If I understand correctly the mentioned factor should only affect the display in viewport not in renders. Google Drive link - https://drive.google.com/drive/folders/1tr2d2VieT7binIXTmRWjdjVT82X3uUEI?usp=sharing **Exact steps for others to reproduce the error** The issue can be repeated by selecting hair particles around 60k, then rendering once and rendering again changing the Viewport Display factor below 100%. I am not certain if the materials and shape of the spline will make it more visible or not but implementing 5+ simple children might affect. Based on the default startup or an attached .blend file (as simple as possible).

Akash banerjee commented

2021-04-10 07:32:25 +02:00

Added subscriber: @neail

Germano Cavalcante commented

2021-04-13 21:16:55 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-04-13 21:16:55 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Germano Cavalcante commented

2021-04-13 21:16:55 +02:00

I cannot reproduce this with either the latest stable or current development versions of Blender:

Here the file I used:
view_hair.blend

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

Go to File → Defaults → Load Factory Settings and then load your file to see if you still can reproduce this issue.

If the problem persists, please give us more clear instructions on how to reproduce it from scratch.

I cannot reproduce this with either the latest stable or current development versions of Blender: Here the file I used: [view_hair.blend](https://archive.blender.org/developer/F9932391/view_hair.blend) Please try the latest daily build: https://builder.blender.org/download/ Go to File → Defaults → Load Factory Settings and then load your file to see if you still can reproduce this issue. If the problem persists, please give us more clear instructions on how to reproduce it from scratch.

Akash banerjee commented

2021-04-15 11:43:42 +02:00

I have provided related screenshots in accord with my statements. I am afraid the situation is due to my system limitations, still, I want to mention I didn't fiddle with default settings, so factory resetting can be omitted from the troubleshooting steps.
The scene I am mentioning is a little heavy for my system, so I tested it on multiple instances of blender (one at a time) but each time that issue sustained.
I am certain that the viewport display amount is affecting the render. The particular scene I have referred to is using displacement applied, level 3 subs (not using modifier stacks in particles). There are 3 other particle systems. and many other things that are making the file bulky. So it is not possible to replicate the case exactly, still, I am trying to find out the cause.

Whatever that is it should not affect the render in any possible situation.

I have provided related screenshots in accord with my statements. I am afraid the situation is due to my system limitations, still, I want to mention I didn't fiddle with default settings, so factory resetting can be omitted from the troubleshooting steps. The scene I am mentioning is a little heavy for my system, so I tested it on multiple instances of blender (one at a time) but each time that issue sustained. I am certain that the viewport display amount is affecting the render. The particular scene I have referred to is using displacement applied, level 3 subs (not using modifier stacks in particles). There are 3 other particle systems. and many other things that are making the file bulky. So it is not possible to replicate the case exactly, still, I am trying to find out the cause. Whatever that is it should not affect the render in any possible situation.

Germano Cavalcante commented

2021-04-15 14:27:26 +02:00

I understand that it can be tricky to find the real cause of the problem, but for the development team to be able to help, there needs to be reproducible steps.

Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

If there are many steps to reproduce the problem, please attach a .blend file saved right before the bug occurs, so only a few steps are needed to trigger the bug.

I understand that it can be tricky to find the real cause of the problem, but for the development team to be able to help, there needs to be reproducible steps. Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly. If there are many steps to reproduce the problem, please attach a .blend file saved right before the bug occurs, so only a few steps are needed to trigger the bug.

Germano Cavalcante commented

2021-05-03 17:26:19 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Germano Cavalcante closed this issue

2021-05-03 17:26:19 +02:00

Germano Cavalcante commented

2021-05-03 17:26:19 +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 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 for the report. If the problem persists please open a new report with the required information.

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Particle system error with evee #87368