Re: [Openexr-devel] OpenEXR Data Channel Configurations

[Angus Taggart]

Richard,

The custom_channels.exr file provides a great combination of RGBA+aux 
channels.

Thanks!

Angus



------------------------------------
Angus Taggart
Apple R&D, Santa Monica


On Nov 15, 2004, at 12:11 PM, Richard Annema wrote:

> Angus Taggart :
>
> We do have an archive of a 'fat' EXR, containing many channels and 
> additional data.
>
> All the image channels are scanline, as we haven't added tiled support 
> to our OpenEXR i/o plugin for 3ds max yet.
>
> I've put it available at :
> http://www.pointzero.nl/temp/openexr_plugin_output.zip - 2.8MB
> A small HTML document gives some explanation on the channels and 
> datatypes (one of which is 'proprietary').
>
> Best regards,
> Richard Annema
> Director of Client Relations
> SplutterFish, LLC
>
> Angus Taggart wrote:
>
> > Thanks everyone for the feedback to my question.
> >
> > At this point, it would be very helpful if we could get some 'fat' 
> > EXR's to do some testing with (i.e. RGBA+aux image data).  Ideally, 
> > we'd like to get a hold of a file in which the image data is stored 
> > in scanlines and a file in which the image data is stored in tiles.
> >
> > Thanks,
> > Angus
> >
> > ------------------------------------
> > Angus Taggart
> > Apple R&D, Santa Monica
> >
> >
> > On Nov 15, 2004, at 2:37 AM, Ciaran Wills wrote:
> >
> > > On Fri, 2004-11-12 at 20:55, Angus Taggart wrote:
> > >
> > > > Hi,
> > > >
> > > > Is it common for facilities to create OpenEXR files that contain 
> > > > both
> > > > standard RGBA data and auxiliary data channels (e.g. normal vector 
> > > > data
> > > > and motion vector data)?  The reason that I ask is that the OpenEXR
> > > > library provides specialized classes for handling scanline and tiled
> > > > RGBA files and I was wondering what the recommended approach would 
> > > > be
> > > > to handling files that contain RGBA+aux data.
> > >
> > >
> > > Hi Angus,
> > >
> > > We've started using 'fat' EXRs on some projects, mainly as it 
> > > simplifies
> > > the asset tracking and versioning process.  Our EXR Shake plugin lets
> > > you choose which channels to load (defaulting to RGBA if they are
> > > present).
> > >
> > > I expect fat EXRs will become more common - several people here have
> > > expressed a preference for working this way if all the relevant tools
> > > support it.
> > >
> > > Ciaran.
> >
> >
> >
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