[Sidefx-houdini-list] Camera model

Javier Meroño javiermerono at hotmail.com
Tue Nov 27 10:06:43 EST 2012


Now that you mention it, I wonder what the trade-offs are for changing a whole lighting pipeline the way DNeg has.
Looking at previous examples , I´m sure it has a cost.


Javier Meroño.

> Date: Tue, 27 Nov 2012 15:50:58 +0100
> From: nick at nicknimble.com
> To: sidefx-houdini-list at sidefx.com
> Subject: Re: [Sidefx-houdini-list] Camera model
> 
> I think a realistic lighting model is definitely the way to go. If you 
> look at how Dneg has recently restructured its entire lighting pipeline 
> to mimic accurate lighting. Its only a matter of time before others will 
> follow. Dneg renders mostly with Renderman, but that is not the point.
> 
> You can find out more about it here: 
> http://www.fxguide.com/fxpodcasts/fxpodcast-225-dnegs-new-lighting-pipeline/ 
> 
> 
> Cheers,
> Nick, be Nimble
> +31 622 4243 94 | www.nicknimble.com | www.facebook.com/nicknimble
> 
> On 11/27/12 3:44 PM, Pablo Giménez wrote:
> > 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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