Tip Needed so that Users Avoid Problem with Motion Blur and Hair Cache #44923

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matthieu barbie · 2015-06-02T09:11:03+02:00

matthieu barbie commented

2015-06-02 09:11:03 +02:00

Hi,

As already talked in a bug report, blender/blender#44711 , this is not really a bug, it's more informations about motion blur and baked datas for hairs simulation.
If you use the baked hair simulation with motion blur, the last frame will have an exponential render time (15 min goes to 8 hours), cause no more datas in the alembic bake for motion blur and blender becomes crazy.

It'll be good to put an important note or tips note in the documentation to say "if you use motion blur in your animation, think to bake all your timeline + 1 frame if you want to use motion blur on baked hairs without problem on the last frame".
Without motion blur, no problem at all on the last frame.

By default I think is better to say, on simulation bake one more frame if motion blur.

Hope will help,
Best Regards,

Matt

Hi, As already talked in a bug report, blender/blender#44711 , this is not really a bug, it's more informations about motion blur and baked datas for hairs simulation. If you use the baked hair simulation with motion blur, the last frame will have an exponential render time (15 min goes to 8 hours), cause no more datas in the alembic bake for motion blur and blender becomes crazy. It'll be good to put an important note or tips note in the documentation to say "if you use motion blur in your animation, think to bake all your timeline + 1 frame if you want to use motion blur on baked hairs without problem on the last frame". Without motion blur, no problem at all on the last frame. By default I think is better to say, on simulation bake one more frame if motion blur. Hope will help, Best Regards, Matt

matthieu barbie commented

2015-06-02 09:11:03 +02:00

Changed status to: 'Open'

matthieu barbie commented

2015-06-02 09:11:03 +02:00

Added subscriber: @matthieubarbie

Aaron Carlisle commented

2015-06-02 17:32:22 +02:00

Added subscriber: @Blendify

Aaron Carlisle commented

2015-06-02 17:32:22 +02:00

more info on the bug is in blender/blender#44711

Aaron Carlisle self-assigned this 2015-06-02 17:32:35 +02:00

Aaron Carlisle changed title from ~~More infos for bake hair system to avoid problem with motion blur on last frame~~ to Tip Needed so that Users Avoid Problem with Motion Blur and Hair Cache

2015-06-02 17:36:23 +02:00

Aaron Carlisle removed their assignment 2015-06-02 17:36:23 +02:00

Aaron Carlisle self-assigned this 2015-09-02 04:32:30 +02:00

Aaron Carlisle commented

2015-09-02 04:32:30 +02:00

Forgot to change some tings here

Aaron Carlisle removed their assignment 2015-09-02 04:32:55 +02:00

blender-admin commented

2015-09-03 13:09:24 +02:00

This issue was referenced by 582