Motion Vector AOV Problem

[Anonymous]

Hi Everybody,

I've a very annoying problem.I need to render a sequence with AOv Passes. I'd like to render the Beauty without motion blur and add it in Nuke through MotionVector AOv Pass. I followed the official tutorial on Youtube so I enabled motion blur on "Arnold Render" Tab, then check "Ignore Motion Blur" on "Diagnostic" Tab, but it doesn't work. As you can see in the image attached, the motionvector aov works only with "Ignore Motion Blur" unchecked.

How can I solve this?

System:

Maya 2017 UD4

Arnold 2.1.0.1

MacOS

[Stephen.Blair]

That's not how you do motion vectors. You need an instantaneous shutter (shutter start = shutter end).

See here: https://support.solidangle.com/x/ywtkAg

[Anonymous]

I did it, but the problem still remains. I don't want motion blur on any AOVs pass. I followed instructions, but it doesn't work.

[Stephen.Blair]

Try with a simple scene first. It does work.

[Anonymous]

I tried with a simple scene (A cube and Sphere translate and rotate). It does work, even without setting an instantaneous shutter (shutter start = shutter end). I've just create a Motion vector AOV, check "Ignore motion blur" and it works perfectly. Can't understand why. My scene is a simple walk cycle. Do I need to check something on mesh attribute editors?

I have different characters and no one works.

[Anonymous]

I think I solved: in camera option I should uncheck "Use Global Shutter" and then set Shutter Start = Shutter End. Now Works.

[Anonymous]

thank you moise ! it fixed it also for me ! i had the exact same issue with my scene .. i really think its buggy when it only works this way .. THANK YOU !