[Sidefx-houdini-list] rendering instances

jason lam earthShatteringKaboom at gmail.com
Fri Mar 13 22:57:36 EDT 2015


Yeah I figured i must have buggered up something simple
thanks for your thoughts I'll deffo check out that vid.
many thanks

Jason

the link is here
https://www.dropbox.com/s/73i1cjphua48ut6/pointsVolumeDeform.hipnc?dl=0

On Sat, Mar 14, 2015 at 4:51 AM, Jordan Halsey <jordanhalsey at gmail.com>
wrote:

> Look into packed primitives, if they are just boxes, you really don't even
> need to instance. The copy sop even has a pack option it it. Depending on
> what you need to do, you might need to look into a more robust packing
> procedure but you would have to watch some tutorials.
> https://vimeo.com/102531317 - In this video he over complicates a few
> things, read the comments as they will clarify some things on workflow,
> especially the second part that I did not link to.
>
> This will drastically reduce your memory over head, and I do mean drastic.
>
> Often I write out alembics as they play well in both Houdini and Maya, and
> if you learn how to use the name attribute correctly and write out alembics
> with partition set to attribute and use name as the attribute ( I describe
> this procedure in the second video's comments) then you will get all your
> grouping correctly translated into Maya under one node, just turn on
> Display Shapes in the Outliner. I would be surprised if you hit a memory
> threshold with 200,000 boxes, i did a quick test with 50 million this way
> on an i7 I mac wih 32 gigs of ram and it rendered in about 5 minutes. I
> also rendered a forrest, same tree so packing reduces everything to that
> one tree and rendered 5 billion poly's but this was on a much beefier
> machine.
>
> Jordan
>
>
>
>
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>
> *Jordan Halsey*
> *maya | houdini | nuke | ae*
> *www.jordanhalsey.com <http://www.jordanhalsey.com>*
> *323-273-9995*
>
> On Fri, Mar 13, 2015 at 10:03 AM, Srecko Micic <srecko.micic at gmail.com>
> wrote:
>
> > Can not see attached file.
> >
> > So even using PBR it eats all RAM ?
> >
> >
> > --
> > Srecko Micic
> > 3D Generalist
> > -------------------------------------------
> > Skype: srecko.micic
> > Email: srecko.micic at gmail.com <mailto:srecko.micic at gmail.com>
> > Portfolio: http://sreckom.webworkman.com/portfolio/
> > > On Mar 13, 2015, at 2:55 AM, jason lam <
> earthShatteringKaboom at gmail.com>
> > wrote:
> > >
> > > Hi Guys,
> > >
> > > Long term lurker since version 4 and occasional dabbler in Houdini now
> > > officially moving over from Maya.
> > > I'm working on a scene where i have a character who is made up of tiny
> > > bits, so i'm filling with a volume scatter and copying instances on it.
> > > Eventually i hope to get it so that i can gradually break him all up
> in a
> > > controlled manner.
> > > So far i have a deforming mesh with some 200k points with a box
> instanced
> > > on to each
> > > and the amount of memeory is enormous and fairly unstable. and it wont
> > > render (originally i had it raytraced with a transparent shader, but
> even
> > > on a basic shader no reflections or refractions, micropolygon rendering
> > it
> > > failed. Mantra just crashes. It will at least start rendering if i
> render
> > > directly in houdini into mplay (even with PBR ) though not at any sort
> of
> > > speed
> > > i'm sure i've done something stupid but can't quite work it out
> > > I"ve attached the file and would appreciate it if you have any
> > suggestions?
> > >
> > > Cheers
> > > Jason
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