[Sidefx-houdini-list] Motion blur with gather()?

Pablo Giménez pablogipi at gmail.com
Tue Oct 14 20:51:33 EDT 2008


2008/10/15 jiversen <jiversen at rhythm.com>

> You can turn on raytracing against motion-blurred objects by adding the
> Rendering Parameter "Raytrace Motion Blur" (vm_traceblur).

Yep, I forget this one .....
In the helps there is asection with many of the parameters for mantra, with
a little explanation(sometimes) try looking for render properties or
something similar.

>
>
> Maybe this will help?
>
>
> Pablo Giménez wrote:
> > Mmm, one dirty solution, very dirty I admit, in case you are converting
> your
> > fluid with the PArticle Fluid Surfacer, as I guess, I think you can use
> th
> > Trail SOP to bring the geometry of the previous frame into your current
> > frame and then send rays agains both of them, maybe it can work, but I
> have
> > said is a very dirty hack.
> >
> > 2008/10/14 Andy Nicholas <andy at andynicholas.com>
> >
> >
> >> Hi,
> >> Thanks for all the info on making my wetmap shader work! Unfortunately,
> >> I've got another related problem that'd be great if I can pick some of
> >> your brains on.
> >>
> >> Since my fluid moves quite quickly it leaves occasional gaps on the
> >> wetmap. If I can get it motion blurred, it'll be sorted. Is it possible
> to
> >> somehow detect the motion of the fluid inside the gather loop? Just to
> be
> >> clear, I don't mean picking up the velocity attribute, just that I'd
> like
> >> the gather() samples to realise that they should be stratified over time
> >> so that I can average them together to produce the blur.
> >>
> >> Is it possible to set this up somehow in the shader?
> >>
> >> Thanks
> >>
> >> Andy
> >>
> >> _______________________________________________
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> >>
> >>
> >
> >
> >
> >
>
> --
> jason iversen
>  fx supervisor
>    r+h
>
>  is this awesome? (y/n)
>
>
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-- 
Un saludo
Best Regards
Pablo Giménez



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