Hair dynamics issue #89000
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Reference: blender/blender#89000
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System Information
Operating system: Catalina 10.15.7
Processor: 2.9 GHz 6-Core Intel Core i9
Memory: 32 GB 2400 MHz DDR4
Graphics card: Radeon Pro 560X 4 GB, Intel UHD Graphics 630 1536 MB
Blender Version
Broken: 2.93
Short description of error
Hair doesn't follow emitter when hair dynamics is enabled. Hair dynamics have no settings , keyframe animation, yet hair properties change randomly.
Exact steps for others to reproduce the error
Hair on head linked to armature in a walking cycle
Mainclown1.blend
Mainclown1errorreview.blend
Added subscriber: @Mgl
Added subscriber: @EvertonSchneider
Hi. I'm not a developer but I looked into your file and noticed some problems with the hair dynamic settings. After resetting all hair dynamics values to their defaults and changed a little the mesh (optimizing) and lowered the actual hair strands count and increased the count with children's particles(also with all values reset to defaults) it's working fine here.
Mainclown1errorreview_ALT.blend
Added subscriber: @ankitm
Changed status from 'Needs Triage' to: 'Needs User Info'
The files are too large to track down the issue.
Please add a simple blend file with steps to redo the bug.
Added subscriber: @iss
Changed status from 'Needs User Info' to: 'Archived'
Even with original file when you bake hair cache it seems to be working. Baking is needed for dynamics unless you play every frame of simulation.
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If you think you found a bug, please submit a new report and carefully follow the instructions. Be sure to provide system information, Blender version, and a .blend file with exact steps to reproduce the problem.