Motion vector AOV in Karma

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Tom Mangold
20.5 the same. No shading except from black pixels in the motion vectors aov. 20.5.332

Normal map, depth map, all show up nicely. MV doesn't.

What are the setting which need to be enabled/disabled to get the correct aov?


Hey Tom,

Did you put a Motion Blur Lop before USD render rop?

Motion Vectors Will not show up without it.
Pranesh Arry
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digones
pranesh arry
arx_anima
the karma node or the karma standart rendervars node has motion vectors and velocity aov as default to check.
We used them already in production and they work fine, they do not use primvars but a ray level check
ray:motionvector
ray:velocity

Hey there,
I tried checking both the motionvector and velocity in the karma render node, however I still get a blank output. Am I missing something?

Thanks!
Image Not Found

Image Not Found

Have you managed to make it work? I've been stuck trying to output AOV motion vectors with no sucess


Hi!

Based on my experience working with Solaris,
I've created this file which shows different ways to make motion vectors/motion blur work in Solaris.


Here is the file:

Attachments:
MotionVectors.hip (531.7 KB)

Pranesh Arry
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Thanks so much! Putting in the node finally gives me MB and the vectors. But I can't get rid of Karma actually motion blurring the image. While "Disable image blur" is on, it's also grayed out. So, I only need the vectors. : /

Need to check your file tomorrow.
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Might have found the solution. IF I create a custom motion vector path "Disable image blur2 is grayed out and I get amotion vector and beauty image with MB applied.

If I just use the one click motion vector path the dialogue "Disable image blur" goes live and you can click it.
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Tom Mangold
Thanks so much! Putting in the node finally gives me MB and the vectors. But I can't get rid of Karma actually motion blurring the image. While "Disable image blur" is on, it's also grayed out. So, I only need the vectors. : /

Need to check your file tomorrow.

Hey Tom,

Enabling the "Motion Vectors" Pass under the "Utility tab" as shown in the screenshot below should allow you to toggle "Disable image blur".


Attachments:
Motion_Vectors.png (77.7 KB)
Disable_MB.png (66.8 KB)

Pranesh Arry
3D Generalist at North Studio
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