AWS Thinkbox Discussion Forums

Motion blur

Deprecated Frost MX 1.0 Beta Discussion
#21

Velocity passes should work. I just tried frosting a default Particle Flow, and I got the velocity pass that I expected.

Try changing the Motion Blur Mode to Frame Velocity Offset, if it isn’t already. (You can find this control in the Meshing rollout.)

What is your particle source? The most likely problem is that the particles have no velocity, or Frost is not reading the velocity correctly.

Another possible issue is that we may need some workaround to get velocity working in your renderer. I think this only applies to mental ray, which requires a modifier (any modifier) on the Frost object. See: http://www.thinkboxsoftware.com/frost-motion-blur-modes/

#22

I saved a pflow system to prt. I then populated a PRT Loader with the result cache and used that with frost. Rendering in finalRender BTW

Vray seems to generate a proper Vray Velocity

#23

Thanks, I will look into this. It sounds like the issue is finalRender-specific. Is this urgent for you?

It’s a long shot, but you could try:

  1. In the Frost Meshing Rollout, change Motion Blur Mode to “Nearest Frame Velocity Offset”.
  2. In the finalRender Render Setup -> Raytracer tab -> Motion Blur group, change:* Duration (frames): to 0.9 (or something else smaller than 1)
  • Phase: to 50%
#24

No, it is not urgent, just doing some test shots.

Thanks, for checking

The weird thing is if I actually enable mBlur in the render is seems to generate a proper velocity pass ?!

#25

It seems like this may apply to all objects in finalRender, and not just Frost? At least I tried an animated cube and I got the same result.

#26

Hey Paul, I am still checking on this, sorry, it does seem to be an fR issue, meaning in the latest build (3.5 SP4) I cannot generate any velocities UNLESS motion blur is enable in the fR render dialog. So this is just different.

#27

Working now. :blush:

For future finalRender reference:

  1. Set Object fR properties->mBlur “Image” NOT 3d
  2. Enable Motion Blur in render dialog
  3. Add fR Velocity pass
  4. Yay velocities. :slight_smile:
#28

Interesting, thanks! I didn’t even think to try Image motion blur.

#29

LOL either did I! It is not really standard operating procedure as far as other render engines are concerned.

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