Maniphest T84358

Hair physics not working for smoothed objects
Closed, Duplicate
Actions

Assigned To
None
Authored By
Frowin Winkes (frokes)
Jan 4 2021, 2:23 AM
Tags
  • BF Blender
Subscribers
Frowin Winkes (frokes)
Philipp Oeser (lichtwerk)

Description

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.51

Blender Version
Broken: 2.9, 2.91 and 2.92.0 Alpha, branch: master, commit date: 2021-01-03 01:04, hash: rB1e8f2665916c
Worked: none of major 2.9x

Short description of error
Hair physics do not work on replay or bake for smoothed objects. Changing to flat changing makes it work again.

Exact steps for others to reproduce the error

  • delete default cube
  • add a sphere
  • add particle system
  • switch to hair
  • enable hair physics
  • press play

-> Physics work as expected

  • switch object shading to smooth
  • ewind timeline
  • press play

-> Hair does not move and will stay in place if the object is moved

A simple scene showing the bug{F9549501}

Related Objects

Event Timeline

Frowin Winkes (frokes) created this task.Jan 4 2021, 2:23 AM
Philipp Oeser (lichtwerk) added a subscriber: Philipp Oeser (lichtwerk).Jan 4 2021, 9:16 AM

This has been reported before, see T68681: Hair Dynamics: simulation doesn't work depending on smooth/flat shaded surfaces (and nvidia gpus?), will merge these reports.

Philipp Oeser (lichtwerk) closed this task as a duplicate of T68681: Hair Dynamics: simulation doesn't work depending on smooth/flat shaded surfaces (and nvidia gpus?).Jan 4 2021, 9:17 AM