motion blur with the point instancer in solaris

V-Ray V-Ray for Houdini Solaris/USD
1

Hello, I am trying to instance an rbd fracture onto points in solaris with the point instancer. I have this working in terms of the geometry being transformed by the point properties, however I do not get any motion blur with I render the setup. I tried putting down a geometry settings node and turning on velocity blur but this did not seem to work. I can see that all of the velocity data is on the primvar for the instancer but there is no velocity primvar on the instanced geo itself. I tried pointing the geo settings node to the instancer and the geo and I still don’t seem to be getting any motion blur.

Does anyone one know what the correct procedure for this is? I am trying to do an instanced RBD setup with the point instancer in solaris with motion blur on the rbd objects at render time.

Thank you.

-Christian

2

Dear @pixeldrone ​, hello.

Could we please take a look at the setup by sharing the file?
Best way will be via our contact form​ by using V-Ray > Pack Scene and uploading it there.

Important is also to share the used V-Ray and Houdini versions, but this will be visible also after receiving the file.

Waiting for the continuance.

Best regards,
TS

3

In addition, please be informed that we have a special section for V-Ray for Houdini :: Solaris/USD and I will move this thread there.

4

There are controls for instancer velocity handling (same for Karma).
In render geometry settings you should specify whether to use velocity for instancers (“Instance Velocity” attr).

5

Thanks you for your responses. I was able to fix this with the geometry settings as you pointed out. Thank you.

Best, Christian