Motion vector without turning on motion blur?

[mikefrisk]

I want to render a motion vector pass but without rendering the motion blur in the beauty pass for use with RSMB. Is this possible?

[calus]

I want to render a motion vector pass but without rendering the motion blur in the beauty pass for use with RSMB. Is this possible?

As soon as you enable the motion vector pass Octane disable automatically motion blur in the beauty pass.

[juanjgon]

Yes, this is what should happen. The motion blur data is extracted to compute the motion vectors, but the beauty is rendered without the MB effect.

Thanks,
-Juanjo

[mikefrisk]

That makes perfect sense. Don't know how I missed that.

[mikefrisk]

The motion vectors dont seem to be working with RSMB. Is there something im missing?

[mikefrisk]

It appears the rendered motion vector pass isn't seeing the motion max. speed parameter. In IPR the motion vectors appear correct, but in the actual render they do not.

[juanjgon]

Hi,

Can you attach your scene to check it here? What Octane version are you using?

Thanks,
-Juanjo

[mikefrisk]

I'm using 4.02.0.0

[juanjgon]

Hmm, you are right! it seems that the final rendering is not taking into account the max speed parameter. What a weird issue ... investigating ...

Thanks,
-Juanjo

[juanjgon]

Hmm, I've been investigating this issue and your .exr file and the motion vectors are not wrong at all. The problem is that the display in the IPR is tonemapped, while the same image in any linear exr viewer is clipped to the 0..1 values, but the full float motion vectors values are there, as you can see in the attached image.

I wonder if you have some kind of workflow issue while you are applying the motion vectors. Could it be a problem of flipped vectors or something like that? I any case I'm fairly sure that the motion vectors in the .exr files are fine.

Thanks,
-Juanjo