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Particle System on a Rigid Body object spawns incorrectly under specific conditions: with small particle number and different start frame.
Confirmed, NormalPublicBUG

Description

System Information
Operating system: Windows 7
Graphics card: GTX 480

Blender Version
Broken: 2.82 (sub 6), branch: master, commit date: 2020-01-09 10:40, hash: 002f5b826c7c ,

Short description of error
If a particle object is added to a rigid body object, the particle count lowered below 180 and the start frame changed, a stray particle will show up around the objects original location.

Exact steps for others to reproduce the error
From default file:

  1. Open default file
  2. Add rigid body to the default cube
  3. Add particle system to the cube
  4. Change number of particles to below 180
  5. Change particle start frame to e.g. 10

Simple File:

Event Timeline

rndmnm created this task.Thu, Jan 9, 5:00 PM
Germano Cavalcante (mano-wii) changed the task status from Needs Triage to Confirmed.Fri, Jan 10, 3:17 PM

I can confirm. Some particles are spawned near the origin.

Bastien Montagne (mont29) changed the subtype of this task from "Report" to "Bug".Tue, Jan 14, 2:41 PM