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Beveled curves disappear in hair particle system
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System Information
Operating system: Win10 64
Graphics card: Nvidia RTX3070 (497.09)

Blender Version
Broken: 3.0.0 stable release
Worked: LTS 2.93
Caused by rBb9febb54a492: Geometry Nodes: Support modifier on curve objects

Short description of error
Beveled curves disappear as hair particles.
As long as curves don't have any bevel applied, they show up as objects or collections in a hair particle system.
As soon as you apply any sort of bevel, they disappear.

Exact steps for others to reproduce the error

  • Create curve
  • Create hair particle system and select that curve as render object
  • Edit bevel of curve


  • Open .blend file
  • Change bevel depth (hair particles will disappear)

Test File:

Event Timeline

Pratik Borhade (PratikPB2123) changed the task status from Needs Triage to Confirmed.EditedDec 4 2021, 2:46 PM

Hi, thanks for the report. This has been introduced by the commit rBb9febb54a492: Geometry Nodes: Support modifier on curve objects

cc @Hans Goudey (HooglyBoogly)

Will change priority to high. Feel free to reset the priority :)

Pratik Borhade (PratikPB2123) triaged this task as High priority.Dec 4 2021, 2:47 PM

Thanks for the report. Unfortunately this is a known issue in Blender 3.0. The particle system is end of life, so we're planning to focus on replacing it rather than hacking a fix together that might break other areas anyway.