Hair Dynamics (no collision): exploding... #63225
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Reference: blender/blender#63225
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System Information
Operating system: windows 10 version 1803
Graphics card: NVIDIA GeForce GTX 1060 3GB
Blender Version
Broken: blender-2.80-d986b04bd302-win64\blender-2.80.0-git.d986b04bd302-windows64
Worked: (optional)
Short description of error
Hair dynamics not working. Tried baking etc but no joy.
Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).
Just press render
Hair_explosion.blend
Added subscriber: @dundaglan
#72421 was marked as duplicate of this issue
Added subscriber: @nacioss
It works in Ubuntu 18.04.2 with AMD RX580
Hey..btw if you hit the play button in around frame 13 it goes mental. Same with render.. get to 13 or so and see.
All the best
Rob
Last pic is when i just land on frame and go into edit mode then back into object mode. seems to refresh the hair but without dynamicss
Cheers
Has anyone moved forward with this.. any updates?
Cheers
Still with today's 2019-05-19 build i get the issue at frame 13.. also feeing the cache doesn't change
Not sure if it's related on dynamics. Disabling it does not appear to be affecting on the issue.
One thing to facilitate developers fixing the issue is to simplify the file. Debugging such kind of issues on a fully features animated and rigged character is a huge time sink.
Added subscriber: @lichtwerk
@Sergey: it is dynamics [disabling for all particlesystems on all objects (on the character there are multiple) fixes the explosion for me]
Agree though that a simpler file would be welcome, lets see if I can narrow it down...
Wacky Hair dynamicsto Hair Dynamics (no collision): exploding...Hey
So I decided to go at it again. I exported an obj, imported and re-rigged and re did the hair. Still getting explosions
I turned off the main fur to make it easier/simpler
Any suggestions? Use 1 particle system on 1 mesh?
Hobbes_newbuild_fur_fix.blend
Frame 149.. same for 49. And this is without Dynamics.
Cheers guys
Actually this is new.. the screen is not showing the explosion on this one:
Added subscriber: @Sergey
Added subscribers: @grosgood, @StephenSwaney
Sorry about the duplicate.. couldnt find this thread and I simplified the file for ye.. Anyone find the bug?
Cheers
2.82 still the same
Added subscriber: @mano-wii
Changed status from 'Confirmed' to: 'Archived'
I simplified the file to make it easier to identify the bug (explosion).
If I change the value of the
Pin Goal Strengthto something like1.0. The problem seems to be solved.So I suspect the issue lies in the file system's particle settings and not in the code itself.
The problem is not clearly revealed in this report.
The file is very complex and the scenario described is too time consuming for us to track down.
If it's important it's probably been reported in another report with simpler test case.
Ok let me try that. Fingers crossed. And thanks for looking into it
What happened - the bake worked all the way through but on the dodgy frame (149) the explosion is there. The god thing is that the sim has continued after that where it didn't before so I can at least work around it.
Thank you very much