"lifespan" animation in particle system has a different rendering result between viewport and final render. #86467

New Issue

Kei Yama · 2021-03-10T23:48:59+01:00

Kei Yama commented

2021-03-10 23:48:59 +01:00

System Information
Operating system:win10
Graphics card:GTX 740m

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, build date: 2021-02-25, 09:31:14, hash: 02948a2cab
Worked: I could not find.

Short description of error
When I use the "lifespan" to animation in Particle system.
between viewport render and Ctrl+F12 render is totally different.

In viewport. all particle follow their own lifespan which add in born, but in final render, All particles are rendered by that actual frame lifespan,
this is example, I do this action several times.(stop the particle flow by lifespan->1, then set to 150)

Viewport Render:	Final Render:
viewport.mp4	render.mp4

Exact steps for others to reproduce the error

Open attached file or:
make liquid particle and set the particle object to "meta-ball".
Put some key frames to "lifespan". make ticktack 1 and 150(per several ten frames).
Bake particle simulation
Render animation
Compare viewport with render result
Water-Particle.blend

**System Information** Operating system:win10 Graphics card:GTX 740m **Blender Version** Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, build date: 2021-02-25, 09:31:14, hash: `02948a2cab` Worked: I could not find. **Short description of error** When I use the "lifespan" to animation in Particle system. between viewport render and Ctrl+F12 render is totally different. In viewport. all particle follow their own lifespan which add in born, but in final render, All particles are rendered by that actual frame lifespan, this is example, I do this action several times.(stop the particle flow by lifespan->1, then set to 150) |Viewport Render:|Final Render:| | -- | -- | |[viewport.mp4](https://archive.blender.org/developer/F9887289/viewport.mp4)|[render.mp4](https://archive.blender.org/developer/F9887292/render.mp4)| **Exact steps for others to reproduce the error** - Open attached file or: - make liquid particle and set the particle object to "meta-ball". - Put some key frames to "lifespan". make ticktack 1 and 150(per several ten frames). - Bake particle simulation - Render animation - Compare viewport with render result [Water-Particle.blend](https://archive.blender.org/developer/F9884472/Water-Particle.blend)

Kei Yama commented

2021-03-10 23:48:59 +01:00

Added subscriber: @mrfas

Evan Wilson commented

2021-03-11 01:49:08 +01:00

Added subscriber: @EAW

Evan Wilson commented

2021-03-11 01:49:08 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Evan Wilson commented

2021-03-11 01:49:08 +01:00

Please upload an example blend file to make sure we are all on the same page.

Also, did you bake the simulation before rendering?

Please upload an example blend file to make sure we are all on the same page. Also, did you bake the simulation before rendering?

Kei Yama commented

2021-03-11 07:43:20 +01:00

I pushed the bake button before rendering. (particle property->cache-> bake)
If more bake is needed, really sorry for disturbing.

Water-Particle.blend

I pushed the bake button before rendering. (particle property->cache-> bake) If more bake is needed, really sorry for disturbing. [Water-Particle.blend](https://archive.blender.org/developer/F9884472/Water-Particle.blend)

Evan Wilson commented

2021-03-11 14:11:02 +01:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Germano Cavalcante commented

2021-03-12 16:45:28 +01:00

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

Germano Cavalcante commented

2021-03-12 16:45:51 +01:00

Added subscriber: @mano-wii

Philipp Oeser removed the

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"lifespan" animation in particle system has a different rendering result between viewport and final render. #86467