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Keyframing object scale with object hair particles makes particles scale in viewport
Open, Needs Triage by DeveloperPublic

Description

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.64

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e

Short description of error
Object with hair particles (rendered as objects or collection) if scaled, scale only emiter, not particles (that is desired effect), but after keyframing scale on object, particles also are being scaled with emiter. This happens only in viewport (any type of shading), renders are ok.

Exact steps for others to reproduce the error

  1. Add emiter mesh (plane)
  2. Add particles object (cube)
  3. Create particle system with plane as emiter
  4. Set particle system to hair
  5. Set particle system to render object then select cube
  6. For emiter object (plane) add two keyframes with different scale

Details

Type
Bug

Event Timeline

I can confirm.
@Jacques Lucke (JacquesLucke), since the current particle system is about to be replaced with a new one, can you tell if this hair system feature will be affected?
And if it's worth now investigating to find a solution?