[Sidefx-houdini-list] Camera model

Pablo Giménez pablogipi at gmail.com
Tue Nov 27 09:44:45 EST 2012

2012/11/27 Colin Doncaster <colin.doncaster at gmail.com>

> Hi Jordi,
> I understand the outcome of setting these parameters but what do you mean
> by "set your environment in the most correct way"?
> Also, are referring to a camera shader ( or similar ) that provides more
> than a standard pin hole camera or are you just looking to balance the
> amount of light exposed against the film back based on the described
> settings?
> This of course assumes that you're using energy conserving shaders and
> your shaders, textures, lights etc. are all being managed correctly also.
> Lastly, would doing this in the renderer be the best place?  Ultimately I
> would assume you could reproduce a similar control over exposure in comp,
> and maybe a few new options to mplay to control the exposure based on iso,
> shutter speed and aperture?  Just some thoughts, to me having to re-render
> every time the ISO changes feels like a lot of work.
Well I think this is the main reason because such a realistic camera model
hasn't been implemented yet in Mantra.
I think most SESI clients do this in comp.
Anyway getting a more realistic lighting simulation tool is always welcome
and is the way to go with PBR.

> Cheers
> On 2012-11-25, at 4:19 PM, Jordi Bares Dominguez <jordibares at gmail.com>
> wrote:
> > After a few months off the lists now I am back and wanted to start by
> requesting SideFX through this list an feature on the camera model.
> >
> > Seems to me after exploring various options that the camera is not fully
> modelled and exposure controls are not there yet, meaning, I would like to
> deal with ISO speed, shutter speed and aperture and set my environment in
> the most correct possible way.
> >
> > I have been using this with Mental Ray over the course of the last 4
> years in various degrees and although at first may seem unnecessary in my
> experience brings a lot of value and would like to throw the idea to the
> community to discuss it and may be even have a workaround/method/trick to
> the system.
> >
> > Actually looking at the implementation from Next Limit in Maxwell plugin
> for Houdini I am looking after something like that… I feel this should be
> part of the core package so there you go…
> >
> > thanks in advance
> > jb
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Un saludo
Best Regards
Pablo Giménez

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