C4D Hair fails with Octane Motion Blur

[jayroth]

I have an animated character with hair. The style ranges from longer hair on the top of the head, to shorter hair on the sides and back of the head. The shorter hair clips away when the head changes position, but not rotation. When I disable motion blur, the hair is stable. The shot requires motion blur (as does everything I do). I have the appropriate Octane tags on the parent object of the hierarchy, set to Transform/Vertex, and assigned a Mesh Number of 1 to it.

Is this a known issue, or is there a workaround for it?

Thanks.

[aoktar]

dynamic objects can requires caching.

[jayroth]

Dynamics are disabled both in my scene and for the hair.

[aoktar]

Ok have you done some tests on simple scenes with hair? As I remember that should work fine with motion blur. Can you post a minimal scene to show problem?

Note; Currently any kind of geometry would require constant amount vertices. Otherwise that will produce corrupt output. Because plugin uses vertex points for time sampling rather than vertex speeds.

[jayroth]

I'm putting together a test scene for you now.

[jayroth]

Hello Aoktar,

Here is the test scene. As this scene reveals, the hair is not motion blurring at all, and that is the issue. How to resolve it?

Octane_Hair_MoBlur_Bug.zip

(149.47 KiB) Downloaded 213 times

[aoktar]

I think it's related with different FPS values for scene and render output.

[jayroth]

They are the same in my actual file. I had re-used my production settings on the test file, which is 24FPS, but Cinema defaults to 30. I didn't change that in the test.

[jayroth]

I changed the settings in my test file to 24FPS for the project as well, and I am still having the issue. FPS is not it.

[aoktar]

Can you test this? It's ok