Particle Edit Breaks After Selecting a Mesh with Cloth Physics #83979

New Issue

Alexander Meißner · 2020-12-20T11:23:05+01:00

2020-12-20 11:23:05 +01:00

System Information
Operating system: macOS 10.13.6
Graphics card: NVIDIA GeForce GT 650M 1024 MB

Blender Version
Broken: at least 2.82 up to 2.92 experimental (I suspect it never worked since 2.80)
Worked: 2.79

Short description of error
Particle edit behaves like object edit mode, but the UI shows "Particle Edit" being active.

There is no circle typical for the comb tool around the mouse cursor.
No additional key points to select or black hair strands are rendered.
Instead of e.g. combing you will move the object around once you drag with the mouse.
Basically everything except for the UI stays in "Object Mode".

Effect On (broken):

Effect Off (works as expected):

Exact steps for others to reproduce the error
Based on the default startup:

Go to "Particle Properties"
Add a particle system
Set its type to "Hair"
Add a second particle system
Set its type to "Hair" too
Add a new mesh e.g. "Plane"
Go to "Physics Properties"
Add "Cloth" physics
Select the original "Cube" again
Switch mode to "Particle Edit"

Ways to reverse the effect (make "Particle Edit" work properly again):

Either: Make a new file and append both objects of the old file
Or: Delete one of the particle systems on the "Cube" and undo the operation

Even after reversing it you can restore the effect by selecting the "Plane" once.
At least two particle systems are required for the effect.

The effect can even be saved and stays the same after loading from the file again.
Thus I was able to create two files one with the effect and one without.
The file without the effect is a little bigger in size.

EffectOn.blend

EffectOff.blend

It took me a whole day to find the cause and boil it down so far.
Hope it helps and that it can be fixed with the provided info.

**System Information** Operating system: macOS 10.13.6 Graphics card: NVIDIA GeForce GT 650M 1024 MB **Blender Version** Broken: at least 2.82 up to 2.92 experimental (I suspect it never worked since 2.80) Worked: 2.79 **Short description of error** Particle edit behaves like object edit mode, but the UI shows "Particle Edit" being active. - There is no circle typical for the comb tool around the mouse cursor. - No additional key points to select or black hair strands are rendered. - Instead of e.g. combing you will move the object around once you drag with the mouse. Basically everything except for the UI stays in "Object Mode". Effect On (broken): ![EffectOn.png](https://archive.blender.org/developer/F9519241/EffectOn.png) Effect Off (works as expected): ![EffectOff.png](https://archive.blender.org/developer/F9519240/EffectOff.png) **Exact steps for others to reproduce the error** Based on the default startup: 1. Go to "Particle Properties" 2. Add a particle system 3. Set its type to "Hair" 4. Add a second particle system 5. Set its type to "Hair" too 6. Add a new mesh e.g. "Plane" 7. Go to "Physics Properties" 8. Add "Cloth" physics 9. Select the original "Cube" again 10. Switch mode to "Particle Edit" Ways to reverse the effect (make "Particle Edit" work properly again): - Either: Make a new file and append both objects of the old file - Or: Delete one of the particle systems on the "Cube" and undo the operation Even after reversing it you can restore the effect by selecting the "Plane" once. At least two particle systems are required for the effect. The effect can even be saved and stays the same after loading from the file again. Thus I was able to create two files one with the effect and one without. The file without the effect is a little bigger in size. [EffectOn.blend](https://archive.blender.org/developer/F9519239/EffectOn.blend) [EffectOff.blend](https://archive.blender.org/developer/F9519247/EffectOff.blend) It took me a whole day to find the cause and boil it down so far. Hope it helps and that it can be fixed with the provided info.

Alexander Meißner commented

2020-12-20 11:23:05 +01:00

Added subscriber: @Lichtso

Philipp Oeser commented

2020-12-21 12:19:44 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-12-21 12:19:44 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Philipp Oeser commented

2020-12-21 12:19:44 +01:00

Nice find, can confirm

Alexander Meißner commented

2022-01-18 10:27:08 +01:00

I found the cause for this:

After selecting an object with cloth physics, the particle edit mode automatically switches to "Cloth".
When the user selects an object with a particle system it is not changed back to "Particles".

So the solution is to either not switch automatically, or switch it back again if the selected object has no cloth physics.

I found the cause for this: ![ToolOptions.png](https://archive.blender.org/developer/F12809792/ToolOptions.png) After selecting an object with cloth physics, the particle edit mode automatically switches to "Cloth". When the user selects an object with a particle system it is not changed back to "Particles". So the solution is to either not switch automatically, or switch it back again if the selected object has no cloth physics.

Dalai Felinto commented

2022-05-09 15:18:13 +02:00

Added subscriber: @dfelinto

Dalai Felinto commented

2022-05-09 15:18:13 +02:00

Thanks for the report. Marking this as known issue since it depends on the old particle settings which is end of life .

Thanks for the report. Marking this as known issue since it depends on the [old particle settings which is end of life ](https://developer.blender.org/tag/nodes_physics/).

Philipp Oeser removed the

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Particle Edit Breaks After Selecting a Mesh with Cloth Physics #83979