RSMB + Vray...

[jstrob]

Just a thought. I was used to work only with RSMB without any vector pass to speed up the process. But lately since vray became faster, I end up using more and more true mblur. What I found is that you can render noisy true mblur in vray and then use RSMB just to smooth the result. You get faster rendering with almost perfect motion blur.

[vlado]

What I found is that you can render noisy true mblur in vray and then use RSMB just to smooth the result. You get faster rendering with almost perfect motion blur.

That's an interesting approach - can you explain a bit how to do that?

Best regards,
Vlado

[3Dmotif]

Just a thought. I was used to work only with RSMB without any vector pass to speed up the process. But lately since vray became faster, I end up using more and more true mblur. What I found is that you can render noisy true mblur in vray and then use RSMB just to smooth the result. You get faster rendering with almost perfect motion blur.

I know this is old but please do explain. that sounds great!

[Morbid Angel]

sometimes we tried this same method, i.e. render motion blur at half the length then blur it with mv for the other half. But I prefere 3d mb always

[jstrob]

Hi,

Sorry to answer so late, just discover I had questions on this thread...

In fact I don't render my vray 3d motion blur half length and I don't use motion vector. I just render motion blur with vray like for the final except that my sampling are less high to accelerate render but it results in some noise in the motion blur. So I just load my layer in after effects and apply reel smart motion blur (or RSMB pro without mv: I try both and see which one work better) with the default values or less. So the Reel Smart Motion Blur filter adds just enough blur to remove the noise but not enough to screw the look of the motion blur most of the time. But sometimes

but now I just learn a few things about how how vray work and my renders with motion blur and DOF are almost cut in half. So I can make them even less noisy.

you can see an example here:
without RSMB





and with RSMB: (in that case I rendered a bit higher rez (1960 xx 1120) it was in order to add a camera shake but I can also cut the wrong calculation made by RSMB on the border.

[Pixelcon]

Sorry for digging up an old thread, but I'm having issues with RSMB and using the velocity pass.

Here's the render with Vray motion blur and the desired final effect I'm after:


I'm using the following settings for the velo pass in vray:


I get the following velo pass:


And after following vlado's instructions I end up with this:

settings:



Both passes have been rendered in 32bit and the AE comp is in 32 bit. I have attached the two passes here in case anyone can see if they can get it to work?

Any help is much appreciated!

[Pixelcon]

Here are the files: moBlurTest.zip

[Pixelcon]

ok I managed to eventually get it working using this method: https://www.youtube.com/watch?v=HzxSPagOYY4

[urbanite]

Thank you for sharing James. I am sure I will find this link useful at some point.

Best,
Tomek