Motion blur doesn't work with Phoenix water

[jamyshaw]

Hi all,

How do you enable motion blur when simulating water in Phoenix FD? I've tried on a VRay camera where I normally use it, and everything else is motion blurred in the scene (animated boxes around it), but the particles in the fountain are not.

I have also tried motion blur in the cameras tab in the VRay camera tab, but also no success??

Any ideas greatly appreciated, as water without motion blur sux!

Cheers.

James.

[Ivaylo Katev]

export the velocity

[jamyshaw]

Do you mean in the "output" tab Ivaylo? So check the velocity output channel and this bakes motion blur into the final render?

Thanks!

[instinct]

Yes on the output tab. Without exporting the velocity channel your fluid basically looks to the renderer like a series of still snapshots rather
than moving liquid.

Regards,
Thorsten

[jamyshaw]

Cool thanks guys, will give that a try at work tomorrow. Cheers!

[jamyshaw]

Great works a treat. Just a little reference to other peeps that find this thread looking for the same thing...

- Make sure the output "velocity" is check when you run the simulation, then it writes this information to the aur files for each frame as normal.
- If your simulation looks like a spiky hedgehog don't panic, just uncheck velocity under the preview tab, it's just giving you a preview of those velocities for each particle.
- If you enable motion blur on your VRay camera (shutter speed say 25, i.e. 1/25 sec) then it'll use this velocity data in the aur file to motion blur the particles.

Niiice!