Fur Motion Blur

[derekhanz]

I'm using H16.5 and Octane 3.08.1.0_Houdini_16.5.439_Win64.

Can't get Motion Blur working at all.
Checked it on in the ROP settings.
Motion Blur works fine for every other object but not fur.
Do I need to feed velocity attribute into the hairgen node?
Any thoughts?

Thank you.

[juanjgon]

Hi,

Have you tried to render the motion blur computing the velocity attribute with the Trail SOP? Perhaps the problem is that the hair object doesn't have a constant topology among the frames, making the computation of the motion blur from the mesh deformations impossible.

In any case, if you want to share a sample scene with this issue, I can take a look at it.

Thanks,
-Juanjo

[derekhanz]

I'm trying to upload the working .hip file but it won't let me.

'The extension hip is not allowed.'

[juanjgon]

I'm trying to upload the working .hip file but it won't let me.

'The extension hip is not allowed.'

You could .zip or .rar the file, or send it to me directly to [email protected]

Thanks,
-Juanjo

[juanjgon]

Hi,

Like I had supposed, the problem was the lack of the velocity vectors (the "v" point attribute) in the final curves OBJ node. As you can see in the attached image, you must add the "v" point attribute to the output attributes in the hair generate OBJ node.

Hope it helps,
-Juanjo