Cycles particle motion blur spans over whole particle life (when not cached) #59568
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Reference: blender/blender#59568
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System Information
Operating system: Linux Mint 19
Graphics card: Nvidia GK107 [GeForce GT 640] with driver : xf86-video-nouveau 1.0.15-2
Blender Version
Broken: 2.8 Date: 2018-12-16 23:25 Hash:
9149e89421Worked: 2.79b
Short description of error
When a particle simulation is not cached, the Cycles motion blur uses the entire lifetime of all particles instead of a single frame
Exact steps for others to reproduce the error
This simple example file shows it very clearly:
Particle motion blur test.blend
Play the simulation and render. Then cache the simulation and re-render the same frame.
Added subscriber: @ChameleonScales
Added subscribers: @brecht, @JacquesLucke
I can reproduce it. I'm not sure how to handle that. Personally I'd not expect cycles motion blur to work when the particle system is not baked, but I don't know how it works.
Closed as duplicate of #59339