Particles on Faces/Volumes with grid does not respect zero gravity #93535

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opened 2021-12-01 06:31:27 +01:00 by RMK · 5 comments

System Information
Operating system: Windows 10
Graphics card: Nvidia GeForce GTX 1650

Blender Version
Broken: 3.0.0 Release candidate, 2.93.4
Worked: Not sure

Particles on Faces/Volumes with grid does not respect zero gravity

  1. Open a default scene and remove the default cube
  2. Add a plane
  3. Add a particle system and change the emission to Faces or Volumes and Distribution to Grid
  4. Change the Gravity to 0 in Field Weights

Expected result: The particles generated needs to move up
Obtained result: The particles generated sticks to the plane

System Information Operating system: Windows 10 Graphics card: Nvidia GeForce GTX 1650 Blender Version Broken: 3.0.0 Release candidate, 2.93.4 Worked: Not sure Particles on Faces/Volumes with grid does not respect zero gravity 1. Open a default scene and remove the default cube 2. Add a plane 3. Add a particle system and change the emission to Faces or Volumes and Distribution to Grid 4. Change the Gravity to 0 in Field Weights Expected result: The particles generated needs to move up Obtained result: The particles generated sticks to the plane
Author

Added subscriber: @RMK-1

Added subscriber: @RMK-1

Added subscriber: @deadpin

Added subscriber: @deadpin

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

It looks like this behavior goes all the way back to at least 2.79. It's not really the gravity though. The Grid distribution method does not seem to obey the Normal velocity parameter (Tangent also operates differently). If you instead use the Object aligned Z parameter for Velocity that seems to work. Unsure if this is a limitation or known issue so will defer to the devs.

It looks like this behavior goes all the way back to at least 2.79. It's not really the gravity though. The Grid distribution method does not seem to obey the Normal velocity parameter (Tangent also operates differently). If you instead use the Object aligned Z parameter for Velocity that seems to work. Unsure if this is a limitation or known issue so will defer to the devs.
Author

Any update on this?

Any update on this?
Philipp Oeser removed the
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Reference: blender/blender#93535
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