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Particle Edit mode Add brush with a radius > 181px crashes
Closed, ResolvedPublicBUG


System Information
Operating system: Win 10 64 bit
Graphics card: Dual Titan RTX

Blender Version
Broken: Blender 2.83.0

Short description of error
Adding hair in Particle Edit causes crashes randomly

Exact steps for others to reproduce the error

  1. Open this .blend:
  2. In Particle Edit mode, try adding some hairs. You may need to change a few settings (count, brush size etc.). Eventually it will crash for seemingly no reason.

Video of it happening:

Event Timeline

Philipp Oeser (lichtwerk) changed the task status from Needs Triage to Confirmed.Mon, Jun 29, 10:20 AM

Can confirm (at least in this file), checking...

Philipp Oeser (lichtwerk) changed the subtype of this task from "Report" to "Bug".

This one seems to be a long-standing issue with the Add brush (is in 2.79 even).
Using the particle Add brush with a radius > 181px will result in a freeze (hangs in brush_add_count_iter due to short overflow.)

Fix incoming...

Philipp Oeser (lichtwerk) renamed this task from Particle Edit mode causes frequent crashes while adding hairs to Particle Edit mode Add brush with a radius > 181px crashes.Mon, Jun 29, 11:15 AM

Whoa that was fast! Thanks so much Philipp.

I tested it in 2.83.1 (didn't realize there was an update) and it hasn't hanged yet. But glad you've committed a fix. Hopefully it's gone for good :)