PhFD particle Velocity pass?

[Truffi]

is there a way to get V-Ray to render the PhoenixFD foam/sand particles' velocity (to apply some post motion blur filters)?
currently the classic method doesn't seem to work.

[flipbook]

Have you tried rendering the particles in geometry mode? I think that would allow you to get the velocity pass

[Svetlin.Nikolov]

Yup - that should be it - keep in mind that for almost any of the render elements to work, you need to switch to Geometry mode.

Cheers!

[Truffi]

Thanks for the hint. In geo mode it does render a velocity pass indeed, however I only get a visible result when I set the internal Motion Blur to "force on" and only in bubble, splash and cells mode. Quite a work around, but I guess this way I can produce what I need. cheers!

[Svetlin.Nikolov]

Have to check that, thanks!

[Svetlin.Nikolov]

Yup, it's a bug - the grid renderer checks if you'd need a velocity render element and gets the velocity even without moblur, but the particle shader doesn't. Good catch, thank you!

[Truffi]

A pleasure.
I appreciate the constant efforts you guys put in improving this tool, pretty glad about the progress of this release. The free upgrade is amazing. Thanks!