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Maniphest T83537

particle instancer modifier 20 years BUG
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Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 452.06

Blender Version
Broken: version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: rB0f45cab862b8
Worked: (newest version of Blender that worked as expected)

Short description of error
[Please fill out a short description of the error here]

Exact steps for others to reproduce the error
[Please describe the exact steps needed to reproduce the issue]
[Based on the default startup or an attached .blend file (as simple as possible)]

look at particle instancer rotation of some parts. you can`t rotate this particles and can`t fix


Related Objects

Event Timeline

Roman Yu (ramoncarlos) created this task.Dec 8 2020, 2:11 AM
Roman Yu (ramoncarlos) added a comment.Dec 8 2020, 8:57 AM

Any help?

Philipp Oeser (lichtwerk) added a project: Nodes & Physics.Dec 8 2020, 11:08 AM
Robert Guetzkow (rjg) changed the task status from Needs Triage to Needs Information from User.Dec 8 2020, 11:44 AM
Robert Guetzkow (rjg) added a subscriber: Robert Guetzkow (rjg).

Could you please provide:

  • a minimal example file that demonstrates the issue
  • step by step instructions to reproduce the problem
Roman Yu (ramoncarlos) added a comment.Dec 8 2020, 9:46 PM

create hair on surface than apply particle instancer modifier to other mesh and get random rotation of all instances(hair)
working good oly on standart blender primitives. Suzane have a BUG too
attach file with BUG
please fix this old issue

Bug.blend907 KBDownload

Roman Yu (ramoncarlos) added a comment.Dec 8 2020, 9:55 PM

try to create feather system but this issue won't let me do it

Robert Guetzkow (rjg) added a comment.Dec 9 2020, 12:14 PM

I can reproduce the behavior, but I'm not familiar with the Particle Instance modifier. A possible workaround could be to render the hair as an object, which gives predictable rotation values. This problem could be related to T76107 which is already confirmed.

Roman Yu (ramoncarlos) added a comment.Dec 9 2020, 1:14 PM

render hair as object can`t allow hair shape. it only like a straight meshes. my strands must replicate shape(bend) of hair.

Robert Guetzkow (rjg) added a comment.EditedDec 9 2020, 3:12 PM

The triaging team looked at this and it seems to be a limitation of the current implementation. You could in theory change the orientation by combing the hair but this would also distort the shape, which might not be a practical solution for your problem. It's not up to the triaging team to define "to do"s for the modules, which means we will need to wait for one of the module owners / developers to make a decision on this.

Philipp Oeser (lichtwerk) changed the task status from Needs Information from User to Needs Information from Developers.Jan 17 2021, 10:43 PM