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(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.



Event Timeline

Philipp Oeser (lichtwerk) lowered the priority of this task from 90 to 80.Nov 27 2019, 11:40 AM

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

GPUShaderInterface: Warning: Uniform XXX not found!

Anything we can do here?

@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.

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 Developer to Reproduce to Needs Information from User.Jan 16 2020, 4:28 PM

Can not reproduce on AMD+windows

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

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

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

Aaron Carlisle (Blendify) claimed this task.

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.