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Maniphest T71916

(Blender 2.81) Hair particles disappear in strip mode
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Description

System Information
Operating system: Microsoft Windows 10 Pro
Graphics card: AMD Radeon Graphics Processor

Blender Version
Broken: version: 2.81 (sub 16), branch: master, type: Release
Worked: 2.80

Short description of error
I installed the newest blender (2.81), and so far it seems amazing, but one thing irks me. In Eevee, the hair particles only work in strand mode. When I try to use strips, they disappear completely. Is there a solution to this issue?

Exact steps for others to reproduce the error
Set "Render Engine" to "Eevee"
Add hair particle system to mesh object
Set "hair type shape" to "strip" under "Hair" in "Render Properties"

EDIT: I ran the Blender via the "blender_debug_gpu_glitchworkaround" command script, and the hairs were able to display as strips. However, I still need to know how to make them work when I run the program from the default executable. I'll provide the debug output.

untitled.blend547 KBDownload

blender_debug_output.txt1 MBDownload

blender_system_info.txt17 KBDownload

Related Objects

Event Timeline

Kenneth Crooker (BatteryMaster) created this task.Nov 26 2019, 5:42 AM
Kenneth Crooker (BatteryMaster) updated the task description. (Show Details)Nov 26 2019, 7:38 PM
Kenneth Crooker (BatteryMaster) updated the task description. (Show Details)Nov 26 2019, 10:25 PM
Kenneth Crooker (BatteryMaster) updated the task description. (Show Details)Nov 26 2019, 10:28 PM
Kenneth Crooker (BatteryMaster) updated the task description. (Show Details)Nov 26 2019, 11:23 PM
Kenneth Crooker (BatteryMaster) updated the task description. (Show Details)Nov 26 2019, 11:31 PM
Philipp Oeser (lichtwerk) lowered the priority of this task from 90 to 80.Nov 27 2019, 11:40 AM
Philipp Oeser (lichtwerk) added a project: GPU / Viewport.
Philipp Oeser (lichtwerk) added subscribers: Clément Foucault (fclem), Philipp Oeser (lichtwerk).

@Clément Foucault (fclem): I can see lots of

GPUShaderInterface: Warning: Uniform XXX not found!

Anything we can do here?

Kenneth Crooker (BatteryMaster) added a comment.Nov 27 2019, 7:02 PM
In T71916#819224, @Philipp Oeser (lichtwerk) wrote:

@Clément Foucault (fclem): I can see lots of

GPUShaderInterface: Warning: Uniform XXX not found!

Anything we can do here?

That's what I'm wondering myself. The problem is fixed temporarily when I run "blender_debug_gpu_glitchworkaround", but I'm just wondering how that can be fixed for good.

Clément Foucault (fclem) added a subscriber: Jeroen Bakker (jbakker).Nov 27 2019, 8:11 PM

The uniform warning is just a warning. It's harmless.

I cannot reproduce on Linux+Intel/Nvidia. Maybe @Jeroen Bakker (jbakker) can repro on AMD+windows.

Richard Antalik (ISS) changed the task status from Needs Information from Developers to Needs Information from User.Jan 16 2020, 4:28 PM
Richard Antalik (ISS) added a subscriber: Richard Antalik (ISS).

Can not reproduce on AMD+windows

Is this still an issue with latest build? https://builder.blender.org/download/

Kenneth Crooker (BatteryMaster) added a comment.EditedJan 24 2020, 7:10 PM

I don't know. Let me see.
UPDATE: Yep. the problem still persists.

Dalai Felinto (dfelinto) added a subscriber: Dalai Felinto (dfelinto).Feb 6 2020, 2:55 PM

What is the "blender_debug_gpu_glitchworkaround", also did you update your graphic card drivers?

Philipp Oeser (lichtwerk) added a comment.Feb 6 2020, 3:22 PM
In T71916#866777, @Dalai Felinto (dfelinto) wrote:

What is the "blender_debug_gpu_glitchworkaround"

https://developer.blender.org/diffusion/B/browse/master/release/windows/batch/blender_debug_gpu_glitchworkaround.cmd

Aaron Carlisle (Blendify) closed this task as Resolved.Feb 14 2020, 10:22 PM
Aaron Carlisle (Blendify) claimed this task.
Aaron Carlisle (Blendify) added a subscriber: Aaron Carlisle (Blendify).

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.

spacesheep001 (spacesheep011) added a subscriber: spacesheep001 (spacesheep011).EditedApr 22 2020, 2:51 AM

Hi, Has this been solved, cuz i'm getting the same problem and i need answers, thank you!

Richard Antalik (ISS) added a comment.Apr 22 2020, 2:25 PM
In T71916#915188, @spacesheep001 (spacesheep011) wrote:

Hi, Has this been solved, cuz i'm getting the same problem and i need answers, thank you!

I wasn't able to reproduce bug in first place, so I don't know if there is anything to be fixed.

Please make sure your GPU drivers are up to date, download latest Blender version https://builder.blender.org/download/ and click on File > Defaults > Load Factory Settings

If you have problems after these steps create new bug report.

spacesheep001 (spacesheep011) added a comment.EditedJun 6 2020, 1:49 AM

i feel dumb, i had this exact same problem, had the exact same graphics card, and the exact same issues as in this post: it used to work for me in 2.8 but no longer after 2.81, all i had to do to fix this for good, was to update my graphics card but i never thought of it until i read about it here, thank u all! i appreciate what u do.

edit:
and i guess yes, resolved.

Clément Foucault (fclem) edited projects, added EEVEE & Viewport; removed GPU / Viewport.Jun 19 2020, 11:04 PM
Philipp Oeser (lichtwerk) mentioned this in T78694: Hair Particles Do Not show in Viewport or Renders when Hair Shape Type under the Render Properties Tab is Set to Strip .Jul 7 2020, 11:19 AM