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Maniphest T60963

Hair dynamics: hair dynamics not rendered in animation mode when using a force field
Open, Confirmed, MediumPublic
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Description

System Information
Operating system: Windows 10 Pro x64
Graphics card: Geforce GTX 1070

Blender Version
Broken: 2.80 690478027bd7

Short description of error

Animation of hair dynamics works in the viewport, but not when rendering an animation. Problem occurs when a surface force field is added and the hair dynamics are part of a linked library.

Exact steps for others to reproduce the error

*File 1 (Library file)*

  1. create a mesh within a collection.
  2. add hair with hair dynamics enabled

*File 2*

  1. link in the collection from file 1. "Instance Collections" is turned on.
  2. add a plane
  3. add a surface force field to the plane
  4. render animation with control f12 - hair does not move (but hair moves in viewport and is affected by force field correctly)

Details

Type
Bug

Related Objects

Event Timeline

Andrew Williams (sobakasu) added a comment.Jan 29 2019, 1:04 AM

T60963_file2.blend99 KBDownload

T60963_file1.blend105 KBDownload

Philipp Oeser (lichtwerk) lowered the priority of this task from Needs Triage by Developer to Confirmed, Medium.Jan 29 2019, 10:59 AM
Philipp Oeser (lichtwerk) added projects: Physics, Datablocks and Libraries.
Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).

Confirming for now, will need some further investigation...

[seems like this is also not working when you make everything local]
[and it seems this is not working because of the hair being in an instance of the collection -- this is the default when you link in collections Instance Collections option]
[if you uncheck that option this is working properly... at least on my side...]
[sidenote: this was confusing me as well in another occasion, see T57693]

Andrew Williams (sobakasu) added a comment.Jan 29 2019, 12:02 PM

Yes, sorry I should have mentioned I linked in the collection.
I have not tried changing the link options. I have instance collections turned on.

Andrew Williams (sobakasu) added a comment.Jan 29 2019, 12:16 PM

I tried to simplify the steps to reproduce by adding an instance of the collection in the same file like you suggested. Then blender crashes when I try to render the animation.