[Sidefx-houdini-list] object ID passes

Alvaro Castaneda varomix at gmail.com
Thu Nov 3 12:03:07 EDT 2016


There's control on the objects for reflections and refractions
also light masks so you can pick what you need, see this image

http://prnt.sc/d2mwih

On Thu, Nov 3, 2016 at 9:52 AM, Gary Jaeger <gary at corestudio.com> wrote:

> Great, thanks Alvaro. I’ll take a look.
>
> What I need is pretty common which makes me think I’m missing something. A
> live action plate with a table and a some tablets, phones etc. We’re adding
> fx. So the devices and table need to reflect the fx but not cast their own
> shadows. The fx need to reflect in everything and cast shadows on
> everything. I’m used to being able to generate in v-ray raw reflection and
> raw shadow passes and being able to exclude primary visibility of objects.
> Usually can get everything we need in one render pass. That sort of thing.
> Early days of mantra for us but just thought we’d dive in head first :)
>
> Gary Jaeger / 650.728.7957 direct / 415.518.1419 mobile
> http://corestudio.com <http://corestudio.com/>
> > On Nov 3, 2016, at 8:19 AM, Alvaro Castaneda <varomix at gmail.com> wrote:
> >
> > Hi Gary
> > is very simple to do, you could use the Op_Id pass, is a diagnostic pass
> in
> > matra, is already there in the extra images, that will generate a
> different
> > ID for each NODE, if you want something per material, just use a
> parameter
> > node inside the material, name it something like Obj_ID1  make it a color
> > and assign red for example, make it export always and make that a new
> extra
> > image plane with that name,
> > for other materials just copy that node and change the color.
> >
> >
> > here's an example file http://box.varomix.net/index.
> php/s/irWlqTI0ph9MwYN
> >
> > if you have any questions let me know
> >
> > On Thu, Nov 3, 2016 at 8:50 AM, Gary Jaeger <gary at corestudio.com> wrote:
> >
> >> Thanks Olivier but it's all Mantra at the moment.
> >>
> >> On Thu, Nov 3, 2016 at 7:34 AM, Olivier Jeannel <facialdeluxe at gmail.com
> >
> >> wrote:
> >>
> >>> I think Redshift handles this (include / exclude object  from light) ;
> >> and
> >>> this might worth checking but I think there is a control tab in the
> >> "object
> >>> redshift parameters" that gives some controls on the rays (shadow,
> >>> refractions, etc...).
> >>>
> >>> On Thu, Nov 3, 2016 at 3:21 PM, Peter Bowmar <pbowmar at gmail.com>
> wrote:
> >>>
> >>>> All shadow casting control is done on the Light's Shadow Mask.
> >>>>
> >>>> There is no way to set an object to cast shadows on others but not
> cast
> >>> on
> >>>> itself.
> >>>>
> >>>> Likewise, all light controls are per-object, you can't tell a light to
> >>> not
> >>>> illuminate an object.
> >>>>
> >>>> This used to be fixable (with a lot of work) using message passing
> >>> between
> >>>> custom light and surface shaders, however with PBR I think this is
> much
> >>>> harder now :(
> >>>>
> >>>> Cheers,
> >>>>
> >>>> Peter B
> >>>>
> >>>> On 3 November 2016 at 07:14, Gary Jaeger <gary at corestudio.com> wrote:
> >>>>
> >>>>> And related (at least to this job) is there a way to set objects to
> >> not
> >>>>> cast shadows? I'm thinking here of the maya render settings where
> >> it's
> >>>>> possible to set things like "casts shadows" "receives shadows"
> >> "visible
> >>>> in
> >>>>> reflections" etc
> >>>>>
> >>>>> Thanks!
> >>>>>
> >>>>> On Thu, Nov 3, 2016 at 6:34 AM, Gary Jaeger <gary at corestudio.com>
> >>> wrote:
> >>>>>
> >>>>>> Hi. I’m looking for a way to generate object IDs ala v-ray
> >>> multi-mattes
> >>>>> or
> >>>>>> similar. So adding a channel to an exr where objectA matte is in
> >> the
> >>>> red,
> >>>>>> objectB is in the green, etc.
> >>>>>>
> >>>>>> *Gary Jaeger */ 650.728.7957 direct / 415.518.1419 mobile
> >>>>>> http://corestudio.com
> >>>>>>
> >>>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> Gary Jaeger // Core Studio
> >>>>> 249 Princeton Avenue
> >>>>> Half Moon Bay, CA 94019
> >>>>> 650.728.7957 (direct) • 650.728.7060 (main)
> >>>>> http://corestudio.com
> >>>>> _______________________________________________
> >>>>> Sidefx-houdini-list mailing list
> >>>>> Sidefx-houdini-list at sidefx.com
> >>>>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
> >>>>>
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> Cheers,
> >>>>
> >>>> Peter B
> >>>> _______________________________________________
> >>>> Sidefx-houdini-list mailing list
> >>>> Sidefx-houdini-list at sidefx.com
> >>>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
> >>>>
> >>> _______________________________________________
> >>> Sidefx-houdini-list mailing list
> >>> Sidefx-houdini-list at sidefx.com
> >>> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
> >>>
> >>
> >>
> >>
> >> --
> >> Gary Jaeger // Core Studio
> >> 249 Princeton Avenue
> >> Half Moon Bay, CA 94019
> >> 650.728.7957 (direct) • 650.728.7060 (main)
> >> http://corestudio.com
> >> _______________________________________________
> >> Sidefx-houdini-list mailing list
> >> Sidefx-houdini-list at sidefx.com
> >> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
> >>
> > _______________________________________________
> > Sidefx-houdini-list mailing list
> > Sidefx-houdini-list at sidefx.com
> > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>
> _______________________________________________
> Sidefx-houdini-list mailing list
> Sidefx-houdini-list at sidefx.com
> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list
>



More information about the Sidefx-houdini-list mailing list